ITEM03 C15-2026-0024 ADV PACKET JULY13

Board of Adjustment – July 13, 2026

ITEM03 C15-2026-0024 ADV PACKET JULY13 — original pdf

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BOA GENERAL REVIEW COVERSHEET CASE: C15-2026-0024 BOA DATE: Monday, July 13th, 2026 ADDRESS: 3408 Mount Bonnell Rd COUNCIL DISTRICT: 10 OWNER: Bennett Leventhal & AGENT: CleanTag Permits -Linda Sullivan Young Shin Kim ZONING: SF-3 LEGAL DESCRIPTION: LOT 5 BLK A MOUNT BONNELL TERRACE SEC 1 VARIANCE REQUEST: LDC, Section 25-2-492 (Site Development Regulations) from impervious coverage requirements to increase I.C. from 45% (maximum allowed) to 51% (requested), existing (56.25%) SUMMARY: complete a remodel/addition ISSUES: LDC restrictions, topography ZONING LAND USES Site North South East West SF-3 SF-3 SF-3 P LA Single-Family Single-Family Single-Family Greenbelt Lake Austin NEIGHBORHOOD ORGANIZATIONS: Austin Neighborhoods Council Friends of Austin Neighborhoods Highland Park West Balcones Area Neighborhood Assn. Long Canyon Phase II & III Homeowners Assn Inc. Preservation Austin TNR BCP – Travis County Natural Resources ITEM03/1June 24, 2026 Ms.. Linda Sullivan 3408 Mount Bonnell Rd Austin TX, 78731 Property Description: LOT 5 BLK A MOUNT BONNELL TERRACE SEC 1 Re: C15-2026-0024 Dear Linda, Austin Energy (AE) has reviewed your application for the above referenced property, requesting that the Board of Adjustment consider a variance request from LDC Section 25-2-492 (D) at 3408 Mount Bonnell. Austin Energy does not oppose the request, provided that any proposed or existing improvements follow Austin Energy’s Clearance & Safety Criteria, the National Electric Safety Code, and OSHA requirements. All signage will need to stay out of Austin Energy easements and 5’ from existing underground electric lines. Any removal or relocation of existing facilities will be at the owner’s/applicant’s expense. Please use this link to be advised of our clearance and safety requirements which are additional conditions of the above review action: https://library.municode.com/tx/austin/codes/utilities_criteria_manual?nodeId=S1AUENDECR_1 .10.0CLSARE If you require further information or have any questions regarding the above comments, please contact our office. Thank you for contacting Austin Energy. If you require further information or have any questions regarding the above comments, please contact our office. Thank you for contacting Austin Energy. Ashley Robinson, project assistant Austin Energy Public Involvement | Real Estate Services 2500 Montopolis Drive Austin, TX 78741 (512) 322-6050 ITEM03/2ITEM03/3Portion of the City of Austin Land Development Code applicant is seeking a variance from: 25-2-492 (D) (Site Development Regulations) to increase the maximum impervious cover from ____________________________________________________________________________ 45% (required limit) to 51% (requested) in order to remodel an existing single-family residence ____________________________________________________________________________ in an SF-3 zoning district. Exisitng impervious coverage is 56.25% ____________________________________________________________________________ ____________________________________________________________________________ Section 2: Variance Findings The Board must determine the existence of, sufficiency of, and weight of evidence supporting the findings described below. Therefore, you must complete each of the applicable Findings Statements as part of your application. Failure to do so may result in your application being rejected as incomplete. Please attach any additional supporting documents. NOTE: The Board cannot grant a variance that would provide the applicant with a special privilege not enjoyed by others similarly situated or potentially similarly situated. I contend that my entitlement to the requested variance is based on the following findings: Reasonable Use The zoning regulations applicable to the property do not allow for a reasonable use because: the site was originally developed in 1979 prior to current Land Development Code restrictions ____________________________________________________________________________ for SF-3 zoning of 45%. Due to the existing impervious coverage which is legal but ____________________________________________________________________________ non-compliant the proposed additions to the structure of 816 square feet of building coverage, ____________________________________________________________________________ are not able to be approved for building permit. ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ Hardship a) The hardship for which the variance is requested is unique to the property in that: the original development of the property, including retaining walls which are necessary for the ____________________________________________________________________________ topography of the lot, is 1,068.94 square feet over the 45% impervious coveage limit for a SF-3 ____________________________________________________________________________ zoned lot. A reduction of 647.94 square feet of impervious coverage is proposed, however the ____________________________________________________________________________ proposed reduction will not reduce the total impervious coveragte to less than 45% of the lot ____________________________________________________________________________ area. ____________________________________________________________________________ b) The hardship is not general to the area in which the property is located because: the property was developed legally and in compliance with the building ordinances in use at the ____________________________________________________________________________ time of construction and is now non-compliant under current Land Development Code for ____________________________________________________________________________ impervious coverage. ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ City of Austin | Board of Adjustment General/Parking Variance Application 2/9/22 | Page 5 of 8 ITEM03/4Area Character The variance will not alter the character of the area adjacent to the property, will not impair the use of adjacent conforming property, and will not impair the purpose of the regulations of the zoning district in which the property is located because: the proposed plan reduces the impervious coverage in the front yard (driveway and walkway), ____________________________________________________________________________ side yard (walkway), and rear yard (walkway). Proposed additions of deck and conditioned area ____________________________________________________________________________ will impact the rear of the structure which overlooks a waterway. The reduction of impervious ____________________________________________________________________________ coverage will have an overal positive impact on the area. ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ Parking (additional criteria for parking variances only) Request for a parking variance requires the Board to make additional findings. The Board may grant a variance to a regulation prescribed in the City of Austin Land Development Code Chapter 25-6, Appendix A with respect to the number of off-street parking spaces or loading facilities required if it makes findings of fact that the following additional circumstances also apply: 1. Neither present nor anticipated future traffic volumes generated by the use of the site or the uses of sites in the vicinity reasonably require strict or literal interpretation and enforcement of the specific regulation because: N/A ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ 2. The granting of this variance will not result in the parking or loading of vehicles on public streets in such a manner as to interfere with the free flow of traffic of the streets because: N/A ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ 3. The granting of this variance will not create a safety hazard or any other condition inconsistent with the objectives of this Ordinance because: N/A ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ 4. The variance will run with the use or uses to which it pertains and shall not run with the site because: N/A ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ City of Austin | Board of Adjustment General/Parking Variance Application 2/9/22 | Page 6 of 8 ITEM03/5 Section 3: Applicant Certificate I affirm that my statements contained in the complete application are true and correct to the best of my knowledge and belief. Applicant Signature: ___________ ________________________________ Date: _____________ 05/01/2026 Applicant Name (typed or printed): ___________________________________________________ Linda Sullivan - CleanTag Permits Applicant Mailing Address: __________________________________________________________ 2320 Webberville Rd City: ________________________________________ State: ________________ Zip: _______ 78702 Austin TX Phone (will be public information): _ ( _____________________________________ Email (optional – will be public information): _____________________ Section 4: Owner Certificate I affirm that my statements contained in the complete application are true and correct to the best of my knowledge and belief. Owner Signature: ______________________________________________ Date: _____________ Owner Name (typed or printed): ______________________________________________________ Bennett Leventhal & Young Shin Kim Owner Mailing Address: ____________________________________________________________ 3408 Mount Bonnell Rd City: ________________________________________ State: ________________ Zip: _______ 78731 Austin TX Phone (will be public information): ____________________________________________________ Email (optional – will be public information): ____________________________________________ Section 5: Agent Information Agent Name: ____________________________________________________________________ Linda Sullivan or Isabel Villegas for CleanTag Permits Agent Mailing Address: ____________________________________________________________ 2320 Webberville Rd City: ________________________________________ State: ________________ Zip: _______ 78702 Austin TX Phone (will be public information): ________________________________________ Email (optional – will be public information): _ c _____________________ Section 6: Additional Space (if applicable) Please use the space below to provide additional information as needed. To ensure the information is referenced to the proper item, include the Section and Field names as well (continued on next page). A Plan Review (2026-XXXXXX PR) is in review with Residential Review for the proposed remodel _______________________________________________________________________________ addition to the residence. The request for 51% impervious coverage is slightly over what the _______________________________________________________________________________ project may require in order to allow for possible discrpancy from plan to field construction. _______________________________________________________________________________ _______________________________________________________________________________ City of Austin | Board of Adjustment General/Parking Variance Application 2/9/22 | Page 7 of 8 ITEM03/6ITEM03/7ITEM03/83408 Mt Bonnell Rd IMPERVIOUS COVERAGE VARIANCE July 12, 2025 ITEM03/9eXIStInG IMPeRVIoUS CoVeRAGe MOUNT BONNELL RD EXISTING RETAINING WALL lot SIZe: 9,495 SF 4,272 SF ALLOWED: 45% IMPeRVIoUS CoVeR 5,224 SF EXISTING: 55.02% PROPERTY LINE 611 610 609 608 EXISTING ENTRY PATH PORCH 7 0 6 DRIVEWAY 605 EXISTING IC EXISTING AC PAD AND EQUIPMENT CONDITIONED SPACE GARAGE EXISTING CONCRETE STAIR I E N L Y T R E P O R P EXISTING GENERATOR AND PAD EXISTING DECK PROPERTY LINE 596 595 594 593 590 592 585 580 575 571 M P 5 4 : 6 0 : 3 6 2 0 2 / 4 2 / 6 : d e t n i r P IC DIAGRAM - EXISTING 1 1/8" = 1'-0" North EXISTING SPA EXISTING POOL 595 I E N L Y T R E P O R P 590 585 580 575 571 2 3408 Mt Bonnell Rd BOA ADVANCED PACKET - July 12, 2025 GENERAL NOTES: 1. DO NOT SCALE DRAWINGS. EXPLICIT DIMENSION SHALL HAVE PRECEDENCE OVER SCALE. THESE DOCUMENTS HAVE BEEN FORMATTED TO BE PRINTED ON 24” X 36” SHEET SIZES, DRAWINGS PRINTED AT OTHER SIZES ARE NOT NECESSARILY TO SCALE. 2. GENERAL CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS AND ALL OTHER EXISTING CONDITIONS PRIOR TO THE COMMENCEMENT OF THE WORK AND NOTIFY THE ARCHITECT OF ANY DISCREPANCIES. 3. CONTRACTOR TO NOTIFY THE ARCHITECT IN WRITING IN THE EVENT OF A DISCREPANCY BETWEEN THE DRAWINGS AND THE FIELD CONDITIONS. IF IN THE COURSE OF CONSTRUCTION, A STRUCTURAL ISSUE EXISTS WHICH DISAGREES WITH THAT AS INDICATED ON THE DRAWINGS, THE CONTRACTOR SHALL STOP WORK AND NOTIFY THE ARCHITECT. SHOULD THE CONTRACTOR FAIL TO FOLLOW THIS PROCEDURE, THE CONTRACTOR SHALL ASSUME ALL RESPONSIBILITY AND LIABILITY ARISING THERE FROM. 4. ANY DAMAGE TO EXISTING AND OR NEW WORK IN PLACE BY THE CONTRACTOR’S OR SUBCONTRACTOR’S NEGLIGENCE SHALL BE REPAIRED AT NO ADDITIONAL COST TO THE OWNER. 5. ALL NOTES ARE APPLICABLE TO ALL TRADES AND RESPECTIVE CONTRACTORS. ALL NOTES TO BE REVIEWED AND APPLIED TO RELATED BUILDING COMPONENTS. ALL SHEETS ARE TO BE REVIEWED AND ALL APPLICABLE NOTES TO BE APPLIED. GENERAL SITE PLAN NOTES: 1. REFERENCE SITE SURVEY FOR ADDITIONAL INFORMATION NOT SHOWN ON SITE PLAN. 2. ARCHITECTURAL SITE PLAN FOR COORDINATION PURPOSES ONLY. REFER TO CIVIL, LANDSCAPE / HARDSCAPE DRAWINGS FOR ALL DRIVEWAY, SITE WALLS, PLANTERS, PATHS, WATER FEATURES, ETC. AND ADDITIONAL SITE DESIGN REQUIREMENTS AND ADDITIONAL INFORMATION. 3. REFERENCE TREE PROTECTION PLAN FOR EXISTING TREES TO REMAIN AND PROTECTION REQUIREMENTS. 4. LOT SHALL BE GRADED TO DRAIN SURFACE WATER AWAY FROM FOUNDATION WALLS. THE GRADE SHALL FALL A MINIMUM OF 6 INCHES WITHIN THE FIRST 10 FEET (5.2%). WHERE PHYSICAL BARRIERS PROHIBIT REQUIRED FALL, DRAINS OR SWALES SHALL BE CONSTRUCTED TO ENSURE DRAINAGE AWAY FROM THE STRUCTURE. IMPERVIOUS SURFACES WITHIN 10 FEET OF THE BUILDING FOUNDATION SHALL BE SLOPED A MINIMUM OF 1/4 INCH PER FOOT (2%) AWAY FROM THE BUILDING. 5. SURVEYOR SHALL LOCATE ALL BUILDINGS TO ACTUAL ORIENTATION AND COORDINATES WITHIN FILE PROVIDED TO ARCHITECT. 6. BUILDING WORK POINT LOCATION IS DIMENSIONED TO THE EDGE OF SLAB. VISITABILITY EXEMPTION WAIVER PROPERTY EXEMPT FROM EXTERIOR AND INTERIOR VISITABLE ROUTE PROVISION DUE TO BEING A REMODEL/ADDITION AS PER SECTION 25-12-243 R320.1 OF THE CITY OF AUSTIN BUILDING CRITERIA MANUAL. SIDEWALK EXEMPTION WAIVER NO SIDEWALK REQUIRED. SECTION 25-6-353 DOES NOT APPLY SINCE THE ADDITION TO THE EXISTING BUILDING DOES NOT INCREASE THE BUILDING'S GROSS FLOOR AREA BY 50% OR MORE (25-6-353 A.1.b). TOTAL BUILDING COVERAGE NAME AREA COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING GROUND LEVEL, CONDITIONED AREA - EXST GROUND LEVEL, CONDITIONED AREA - NEW 163 SF 616 SF 478 SF 1,996 SF 420 SF 3,674 SF IMPERVIOUS COVER NAME AREA FACTOR AREA AREA NOTES IMPERVIOUS GROUND LEVEL, CONDITIONED AREA - EXST 1,996 SF 1,996 SF EXISTING GROUND LEVEL, CONDITIONED AREA - NEW 420 SF BUILDING COVERAGE COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING SITE COVERAGE CONCRETE FLATWORK - EXST CONCRETE FLATWORK - NEW DRIVEWAY - EXISTING DRIVEWAY - NEW POOL COPING SITE WALL - EXISTING SITE WALL - NEW TOTAL IMPERVIOUS COVER 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 163 SF 616 SF 478 SF 3,674 SF 281 SF 0 SF 579 SF 0 SF 74 SF 103 SF 32 SF 1,069 SF 4,742 SF 163 SF EXISTING 616 SF 478 SF 420 SF 3,674 SF 281 SF <varies> 579 SF EXISTING 0 SF 0 SF 74 SF 103 SF EXISTING 32 SF LESS THAN 4' TALL 1,069 SF 4,742 SF POOL AND SPA AREA POOL SPA 545 SF 0% 84 SF 0% 629 SF 0 SF 0 SF IMPERVIOUS COVER PERCENTAGE ALLOWABLE PROPOSED AREA, PROPERTY AREA IMP % AREA IMP % 9,495 SF 4,273 SF 45.00% 4,762 SF 50.15% GROSS FLOOR AREA NAME AREA DEDUCTION AREA AREA NOTES (25-2-F) CALCULATED 1,127 SF 0 SF BASEMENT - EXST GARAGE GROUND LEVEL - EXST GROUND LEVEL - NEW GROUND LEVEL > 15FT - EXST PORCH FRONT, GROUND LEVEL - EXST PORCH, BASEMENT - EXST PORCH, BASEMENT - NEW PORCH, GROUND LEVEL - EXST PORCH, GROUND LEVEL - NEW CALCULATED FAR 1,127 SF 478 SF 1,864 SF 417 SF 99 SF 163 SF 215 SF 216 SF 195 SF 413 SF 5,187 SF 0 SF 0 SF 0 SF -99 SF 163 SF 200 SF 0 SF 0 SF 0 SF 478 SF EXISTING 1,864 SF EXISTING 417 SF 198 SF 0 SF EXISTING 15 SF EXISTING 195 SF EXISTING 216 SF 413 SF 3,796 SF PROPERTY AREA FLOOR AREA FAR FLOOR AREA FAR 9,495 SF 3,798 SF 40.0% 3,796 SF 40.0% ALLOWABLE PROPOSED F.A.R. NOTES: 1. PLANTER BEDS NOT INCLUDED IN F.A.R. CALCULATIONS. 2. ALL PORCH AREAS COMPLY WITH 25-2-F-3.3.3 AND ARE PARTIALLY DEDUCTED FROM F.A.R. CALCULATIONS. 3. BASEMENT AREA IS EXCLUDED FROM FAR PER CODE PROVISIONS FOR SUB-GRADE SPACE PER 25-2-1002 (≥50% BELOW FINISHED GRADE) SUB-GRADE: 89' - 8" ABOVE GRADE: 84' - 1 1/2" C L L , E R U T C E T I H C R A S U K J A F T T A M mf 900 EAST 6TH STREET SUITE 100 AUSTIN, TX 78702 TEL: 512.432.5137 www.mfarchitecture.com E C N E D I S E R L L E N N O B T N U O M 1 3 7 8 7 , X T , N I T S U A , D R L L E N N O B T N U O M 8 0 4 3 E L T I T T C E J O R P N O I T A M R O F N I T E E H S L A E S These plans, drawings and specifications are the property of Matt Fajkus Architecture and any use and/or reuse thereof in part or in whole without the written permission of the Architect is prohibited. Copyright © 2026 Matt Fajkus Architecture SHEET PRINT DATE: 05/01/2026 REVISIONS Date Description PROJECT NUMBER: 25026 CURRENT PHASE: PERMITTING DRAWING TITLE: IMPERVIOUS CALCULATIONS - EXISTING BOA.1 mfarchitecture ITEM03/10 ReMoVed IMPeRVIoUS CoVeRAGe MOUNT BONNELL RD EXISTING RETAINING WALL lot SIZe: 9,495 SF 4,272 SF ALLOWED: 45% IMPeRVIoUS CoVeR 5,224 SF EXISTING: REMOVED: -1,592 SF REPLACED: 755 SF 55.02% PROPERTY LINE 611 610 609 608 PORCH 7 0 6 DRIVEWAY 605 EXISTING IC REMOVED IC REPLACED IC EXISTING AC PAD AND EQUIPMENT CONDITIONED SPACE GARAGE EXISTING CONCRETE STAIR I E N L Y T R E P O R P EXISTING GENERATOR AND PAD 596 595 594 593 590 592 585 580 575 571 PROPERTY LINE M P 9 0 : 7 0 : 3 6 2 0 2 / 4 2 / 6 : d e t n i r P IC DIAGRAM - DEMO 1 1/8" = 1'-0" North EXISTING SPA EXISTING POOL 595 I E N L Y T R E P O R P 590 585 580 575 571 3 3408 Mt Bonnell Rd BOA ADVANCED PACKET - July 12, 2025 GENERAL NOTES: 1. DO NOT SCALE DRAWINGS. EXPLICIT DIMENSION SHALL HAVE PRECEDENCE OVER SCALE. THESE DOCUMENTS HAVE BEEN FORMATTED TO BE PRINTED ON 24” X 36” SHEET SIZES, DRAWINGS PRINTED AT OTHER SIZES ARE NOT NECESSARILY TO SCALE. 2. GENERAL CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS AND ALL OTHER EXISTING CONDITIONS PRIOR TO THE COMMENCEMENT OF THE WORK AND NOTIFY THE ARCHITECT OF ANY DISCREPANCIES. 3. CONTRACTOR TO NOTIFY THE ARCHITECT IN WRITING IN THE EVENT OF A DISCREPANCY BETWEEN THE DRAWINGS AND THE FIELD CONDITIONS. IF IN THE COURSE OF CONSTRUCTION, A STRUCTURAL ISSUE EXISTS WHICH DISAGREES WITH THAT AS INDICATED ON THE DRAWINGS, THE CONTRACTOR SHALL STOP WORK AND NOTIFY THE ARCHITECT. SHOULD THE CONTRACTOR FAIL TO FOLLOW THIS PROCEDURE, THE CONTRACTOR SHALL ASSUME ALL RESPONSIBILITY AND LIABILITY ARISING THERE FROM. 4. ANY DAMAGE TO EXISTING AND OR NEW WORK IN PLACE BY THE CONTRACTOR’S OR SUBCONTRACTOR’S NEGLIGENCE SHALL BE REPAIRED AT NO ADDITIONAL COST TO THE OWNER. 5. ALL NOTES ARE APPLICABLE TO ALL TRADES AND RESPECTIVE CONTRACTORS. ALL NOTES TO BE REVIEWED AND APPLIED TO RELATED BUILDING COMPONENTS. ALL SHEETS ARE TO BE REVIEWED AND ALL APPLICABLE NOTES TO BE APPLIED. GENERAL SITE PLAN NOTES: 1. REFERENCE SITE SURVEY FOR ADDITIONAL INFORMATION NOT SHOWN ON SITE PLAN. 2. ARCHITECTURAL SITE PLAN FOR COORDINATION PURPOSES ONLY. REFER TO CIVIL, LANDSCAPE / HARDSCAPE DRAWINGS FOR ALL DRIVEWAY, SITE WALLS, PLANTERS, PATHS, WATER FEATURES, ETC. AND ADDITIONAL SITE DESIGN REQUIREMENTS AND ADDITIONAL INFORMATION. 3. REFERENCE TREE PROTECTION PLAN FOR EXISTING TREES TO REMAIN AND PROTECTION REQUIREMENTS. 4. LOT SHALL BE GRADED TO DRAIN SURFACE WATER AWAY FROM FOUNDATION WALLS. THE GRADE SHALL FALL A MINIMUM OF 6 INCHES WITHIN THE FIRST 10 FEET (5.2%). WHERE PHYSICAL BARRIERS PROHIBIT REQUIRED FALL, DRAINS OR SWALES SHALL BE CONSTRUCTED TO ENSURE DRAINAGE AWAY FROM THE STRUCTURE. IMPERVIOUS SURFACES WITHIN 10 FEET OF THE BUILDING FOUNDATION SHALL BE SLOPED A MINIMUM OF 1/4 INCH PER FOOT (2%) AWAY FROM THE BUILDING. 5. SURVEYOR SHALL LOCATE ALL BUILDINGS TO ACTUAL ORIENTATION AND COORDINATES WITHIN FILE PROVIDED TO ARCHITECT. 6. BUILDING WORK POINT LOCATION IS DIMENSIONED TO THE EDGE OF SLAB. VISITABILITY EXEMPTION WAIVER PROPERTY EXEMPT FROM EXTERIOR AND INTERIOR VISITABLE ROUTE PROVISION DUE TO BEING A REMODEL/ADDITION AS PER SECTION 25-12-243 R320.1 OF THE CITY OF AUSTIN BUILDING CRITERIA MANUAL. SIDEWALK EXEMPTION WAIVER NO SIDEWALK REQUIRED. SECTION 25-6-353 DOES NOT APPLY SINCE THE ADDITION TO THE EXISTING BUILDING DOES NOT INCREASE THE BUILDING'S GROSS FLOOR AREA BY 50% OR MORE (25-6-353 A.1.b). TOTAL BUILDING COVERAGE NAME AREA COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING GROUND LEVEL, CONDITIONED AREA - EXST GROUND LEVEL, CONDITIONED AREA - NEW 163 SF 616 SF 478 SF 1,996 SF 420 SF 3,674 SF IMPERVIOUS COVER NAME AREA FACTOR AREA AREA NOTES IMPERVIOUS GROUND LEVEL, CONDITIONED AREA - EXST 1,996 SF 1,996 SF EXISTING GROUND LEVEL, CONDITIONED AREA - NEW 420 SF BUILDING COVERAGE COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING SITE COVERAGE CONCRETE FLATWORK - EXST CONCRETE FLATWORK - NEW DRIVEWAY - EXISTING DRIVEWAY - NEW POOL COPING SITE WALL - EXISTING SITE WALL - NEW TOTAL IMPERVIOUS COVER 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 163 SF 616 SF 478 SF 3,674 SF 281 SF 0 SF 579 SF 0 SF 74 SF 103 SF 32 SF 1,069 SF 4,742 SF 163 SF EXISTING 616 SF 478 SF 420 SF 3,674 SF 281 SF <varies> 579 SF EXISTING 0 SF 0 SF 74 SF 103 SF EXISTING 32 SF LESS THAN 4' TALL 1,069 SF 4,742 SF POOL AND SPA AREA POOL SPA 545 SF 0% 84 SF 0% 629 SF 0 SF 0 SF IMPERVIOUS COVER PERCENTAGE ALLOWABLE PROPOSED AREA, PROPERTY AREA IMP % AREA IMP % 9,495 SF 4,273 SF 45.00% 4,762 SF 50.15% GROSS FLOOR AREA NAME AREA DEDUCTION AREA AREA NOTES (25-2-F) CALCULATED 1,127 SF 0 SF BASEMENT - EXST GARAGE GROUND LEVEL - EXST GROUND LEVEL - NEW GROUND LEVEL > 15FT - EXST PORCH FRONT, GROUND LEVEL - EXST PORCH, BASEMENT - EXST PORCH, BASEMENT - NEW PORCH, GROUND LEVEL - EXST PORCH, GROUND LEVEL - NEW CALCULATED FAR 1,127 SF 478 SF 1,864 SF 417 SF 99 SF 163 SF 215 SF 216 SF 195 SF 413 SF 5,187 SF 0 SF 0 SF 0 SF -99 SF 163 SF 200 SF 0 SF 0 SF 0 SF 478 SF EXISTING 1,864 SF EXISTING 417 SF 198 SF 0 SF EXISTING 15 SF EXISTING 195 SF EXISTING 216 SF 413 SF 3,796 SF PROPERTY AREA FLOOR AREA FAR FLOOR AREA FAR 9,495 SF 3,798 SF 40.0% 3,796 SF 40.0% ALLOWABLE PROPOSED F.A.R. NOTES: 1. PLANTER BEDS NOT INCLUDED IN F.A.R. CALCULATIONS. 2. ALL PORCH AREAS COMPLY WITH 25-2-F-3.3.3 AND ARE PARTIALLY DEDUCTED FROM F.A.R. CALCULATIONS. 3. BASEMENT AREA IS EXCLUDED FROM FAR PER CODE PROVISIONS FOR SUB-GRADE SPACE PER 25-2-1002 (≥50% BELOW FINISHED GRADE) SUB-GRADE: 89' - 8" ABOVE GRADE: 84' - 1 1/2" C L L , E R U T C E T I H C R A S U K J A F T T A M mf 900 EAST 6TH STREET SUITE 100 AUSTIN, TX 78702 TEL: 512.432.5137 www.mfarchitecture.com E C N E D I S E R L L E N N O B T N U O M 1 3 7 8 7 , X T , N I T S U A , D R L L E N N O B T N U O M 8 0 4 3 E L T I T T C E J O R P N O I T A M R O F N I T E E H S L A E S These plans, drawings and specifications are the property of Matt Fajkus Architecture and any use and/or reuse thereof in part or in whole without the written permission of the Architect is prohibited. Copyright © 2026 Matt Fajkus Architecture SHEET PRINT DATE: 05/01/2026 REVISIONS Date Description PROJECT NUMBER: 25026 CURRENT PHASE: PERMITTING DRAWING TITLE: IMPERVIOUS CALCULATIONS - DEMO BOA.2 mfarchitecture ITEM03/11 PRoPoSed IMPeRVIoUS CoVeRAGe MOUNT BONNELL RD PROPERTY LINE 611 610 609 608 EXISTING RETAINING WALL lot SIZe: 9,495 SF 4,272 SF ALLOWED: 45% IMPeRVIoUS CoVeR 5,224 SF EXISTING: REMOVED: -1,592 SF REPLACED: 755 SF 355 SF ADDED: PROPOSED: 4,742 SF 55.02% 49.94% I E N L Y T R E P O R P EXISTING GENERATOR AND PAD PROPOSED ACCESSIBLE ENTRY PATH DRIVEWAY PORCH 7 0 6 605 EXISTING IC REMOVED IC REPLACED IC ADDED IC EXISTING AC PAD AND EQUIPMENT CONDITIONED SPACE GARAGE EXISTING CONCRETE STAIR PROPOSED DECK POOL WITH INFINITY EDGE POOL CATCH BASIN 595 I E N L Y T R E P O R P 590 585 580 575 571 PROPOSED CONDITIONED SPACE 596 595 594 593 590 592 585 580 575 571 PROPERTY LINE M P 1 4 : 7 0 : 3 6 2 0 2 / 4 2 / 6 : d e t n i r P IC DIAGRAM - PROPOSED 1 1/8" = 1'-0" North 4 3408 Mt Bonnell Rd BOA ADVANCED PACKET - July 12, 2025 GENERAL NOTES: 1. DO NOT SCALE DRAWINGS. EXPLICIT DIMENSION SHALL HAVE PRECEDENCE OVER SCALE. THESE DOCUMENTS HAVE BEEN FORMATTED TO BE PRINTED ON 24” X 36” SHEET SIZES, DRAWINGS PRINTED AT OTHER SIZES ARE NOT NECESSARILY TO SCALE. 2. GENERAL CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS AND ALL OTHER EXISTING CONDITIONS PRIOR TO THE COMMENCEMENT OF THE WORK AND NOTIFY THE ARCHITECT OF ANY DISCREPANCIES. 3. CONTRACTOR TO NOTIFY THE ARCHITECT IN WRITING IN THE EVENT OF A DISCREPANCY BETWEEN THE DRAWINGS AND THE FIELD CONDITIONS. IF IN THE COURSE OF CONSTRUCTION, A STRUCTURAL ISSUE EXISTS WHICH DISAGREES WITH THAT AS INDICATED ON THE DRAWINGS, THE CONTRACTOR SHALL STOP WORK AND NOTIFY THE ARCHITECT. SHOULD THE CONTRACTOR FAIL TO FOLLOW THIS PROCEDURE, THE CONTRACTOR SHALL ASSUME ALL RESPONSIBILITY AND LIABILITY ARISING THERE FROM. 4. ANY DAMAGE TO EXISTING AND OR NEW WORK IN PLACE BY THE CONTRACTOR’S OR SUBCONTRACTOR’S NEGLIGENCE SHALL BE REPAIRED AT NO ADDITIONAL COST TO THE OWNER. 5. ALL NOTES ARE APPLICABLE TO ALL TRADES AND RESPECTIVE CONTRACTORS. ALL NOTES TO BE REVIEWED AND APPLIED TO RELATED BUILDING COMPONENTS. ALL SHEETS ARE TO BE REVIEWED AND ALL APPLICABLE NOTES TO BE APPLIED. GENERAL SITE PLAN NOTES: 1. REFERENCE SITE SURVEY FOR ADDITIONAL INFORMATION NOT SHOWN ON SITE PLAN. 2. ARCHITECTURAL SITE PLAN FOR COORDINATION PURPOSES ONLY. REFER TO CIVIL, LANDSCAPE / HARDSCAPE DRAWINGS FOR ALL DRIVEWAY, SITE WALLS, PLANTERS, PATHS, WATER FEATURES, ETC. AND ADDITIONAL SITE DESIGN REQUIREMENTS AND ADDITIONAL INFORMATION. 3. REFERENCE TREE PROTECTION PLAN FOR EXISTING TREES TO REMAIN AND PROTECTION REQUIREMENTS. 4. LOT SHALL BE GRADED TO DRAIN SURFACE WATER AWAY FROM FOUNDATION WALLS. THE GRADE SHALL FALL A MINIMUM OF 6 INCHES WITHIN THE FIRST 10 FEET (5.2%). WHERE PHYSICAL BARRIERS PROHIBIT REQUIRED FALL, DRAINS OR SWALES SHALL BE CONSTRUCTED TO ENSURE DRAINAGE AWAY FROM THE STRUCTURE. IMPERVIOUS SURFACES WITHIN 10 FEET OF THE BUILDING FOUNDATION SHALL BE SLOPED A MINIMUM OF 1/4 INCH PER FOOT (2%) AWAY FROM THE BUILDING. 5. SURVEYOR SHALL LOCATE ALL BUILDINGS TO ACTUAL ORIENTATION AND COORDINATES WITHIN FILE PROVIDED TO ARCHITECT. 6. BUILDING WORK POINT LOCATION IS DIMENSIONED TO THE EDGE OF SLAB. VISITABILITY EXEMPTION WAIVER PROPERTY EXEMPT FROM EXTERIOR AND INTERIOR VISITABLE ROUTE PROVISION DUE TO BEING A REMODEL/ADDITION AS PER SECTION 25-12-243 R320.1 OF THE CITY OF AUSTIN BUILDING CRITERIA MANUAL. SIDEWALK EXEMPTION WAIVER NO SIDEWALK REQUIRED. SECTION 25-6-353 DOES NOT APPLY SINCE THE ADDITION TO THE EXISTING BUILDING DOES NOT INCREASE THE BUILDING'S GROSS FLOOR AREA BY 50% OR MORE (25-6-353 A.1.b). TOTAL BUILDING COVERAGE NAME AREA COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING GROUND LEVEL, CONDITIONED AREA - EXST GROUND LEVEL, CONDITIONED AREA - NEW 163 SF 616 SF 478 SF 1,996 SF 420 SF 3,674 SF IMPERVIOUS COVER NAME AREA FACTOR AREA AREA NOTES IMPERVIOUS GROUND LEVEL, CONDITIONED AREA - EXST 1,996 SF 1,996 SF EXISTING GROUND LEVEL, CONDITIONED AREA - NEW 420 SF BUILDING COVERAGE COVERED PORCH -EXIST DECK, COVERED GARAGE - EXISTING SITE COVERAGE CONCRETE FLATWORK - EXST CONCRETE FLATWORK - NEW DRIVEWAY - EXISTING DRIVEWAY - NEW POOL COPING SITE WALL - EXISTING SITE WALL - NEW TOTAL IMPERVIOUS COVER 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 163 SF 616 SF 478 SF 3,674 SF 281 SF 0 SF 579 SF 0 SF 74 SF 103 SF 32 SF 1,069 SF 4,742 SF 163 SF EXISTING 616 SF 478 SF 420 SF 3,674 SF 281 SF <varies> 579 SF EXISTING 0 SF 0 SF 74 SF 103 SF EXISTING 32 SF LESS THAN 4' TALL 1,069 SF 4,742 SF POOL AND SPA AREA POOL SPA 545 SF 0% 84 SF 0% 629 SF 0 SF 0 SF IMPERVIOUS COVER PERCENTAGE ALLOWABLE PROPOSED AREA, PROPERTY AREA IMP % AREA IMP % 9,495 SF 4,273 SF 45.00% 4,762 SF 50.15% GROSS FLOOR AREA NAME AREA DEDUCTION AREA AREA NOTES (25-2-F) CALCULATED 1,127 SF 0 SF BASEMENT - EXST GARAGE GROUND LEVEL - EXST GROUND LEVEL - NEW GROUND LEVEL > 15FT - EXST PORCH FRONT, GROUND LEVEL - EXST PORCH, BASEMENT - EXST PORCH, BASEMENT - NEW PORCH, GROUND LEVEL - EXST PORCH, GROUND LEVEL - NEW CALCULATED FAR 1,127 SF 478 SF 1,864 SF 417 SF 99 SF 163 SF 215 SF 216 SF 195 SF 413 SF 5,187 SF 0 SF 0 SF 0 SF -99 SF 163 SF 200 SF 0 SF 0 SF 0 SF 478 SF EXISTING 1,864 SF EXISTING 417 SF 198 SF 0 SF EXISTING 15 SF EXISTING 195 SF EXISTING 216 SF 413 SF 3,796 SF PROPERTY AREA FLOOR AREA FAR FLOOR AREA FAR 9,495 SF 3,798 SF 40.0% 3,796 SF 40.0% ALLOWABLE PROPOSED F.A.R. NOTES: 1. PLANTER BEDS NOT INCLUDED IN F.A.R. CALCULATIONS. 2. ALL PORCH AREAS COMPLY WITH 25-2-F-3.3.3 AND ARE PARTIALLY DEDUCTED FROM F.A.R. CALCULATIONS. 3. BASEMENT AREA IS EXCLUDED FROM FAR PER CODE PROVISIONS FOR SUB-GRADE SPACE PER 25-2-1002 (≥50% BELOW FINISHED GRADE) SUB-GRADE: 89' - 8" ABOVE GRADE: 84' - 1 1/2" C L L , E R U T C E T I H C R A S U K J A F T T A M mf 900 EAST 6TH STREET SUITE 100 AUSTIN, TX 78702 TEL: 512.432.5137 www.mfarchitecture.com E C N E D I S E R L L E N N O B T N U O M 1 3 7 8 7 , X T , N I T S U A , D R L L E N N O B T N U O M 8 0 4 3 E L T I T T C E J O R P N O I T A M R O F N I T E E H S L A E S These plans, drawings and specifications are the property of Matt Fajkus Architecture and any use and/or reuse thereof in part or in whole without the written permission of the Architect is prohibited. Copyright © 2026 Matt Fajkus Architecture SHEET PRINT DATE: 05/01/2026 REVISIONS Date Description PROJECT NUMBER: 25026 CURRENT PHASE: PERMITTING DRAWING TITLE: IMPERVIOUS CALCULATIONS - PROPOSED BOA.3 mfarchitecture ITEM03/12 eleVAtIon UPdAteS GARAGe dooR RePlACeMentS wIndow RePlACeMentS new MetAl RooF FReSh PAInt hARdSCAPe ReMoVAl 5 3408 Mt Bonnell Rd BOA ADVANCED PACKET - July 12, 2025 ITEM03/13ITEM03/141977 Aerial ITEM03/151984 Aerial ITEM03/162023 Aerial ITEM03/17ITEM03/18