# Building permits at 1818 Walnut St, Boulder, CO 14 permits on record here. The newest, Sep 16: All Structures must be permitted separately Total tear-off & reroof of SFD. Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Sep 16, 2026 | Roofing | All Structures must be permitted separately Total tear-off & reroof of SFD, 23 squares of dimensional shingles on a pitch represented as 8/12. All roof materials shall be installed per manufacturer?s specs. Mid-roof inspection is required if 1) pitch is less than 4/12 or 2) for any roof type other t | $9,017 | [RFG2026-00768](https://nearbypermits.com/boulder/permit/RFG2026-00768/) | | Aug 26, 2025 | Mechanical (HVAC) | Replacement furnace 96% AFUE and heat pump replacing an air conditioner 36,000 BTU 19 SEER2. All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the pressure test directly to the assigned | $15,151 | [MEC2025-01405](https://nearbypermits.com/boulder/permit/MEC2025-01405/) | | Feb 9, 2010 | Fence, wall or deck | Fence Permit - For 5-foot tall cedar picket fence 60 feet long on rear sides of property. (See his2009-00142) | $1,500 | [PMT2010-00488-FEN](https://nearbypermits.com/boulder/permit/PMT2010-00488-FEN/) | | Nov 16, 2009 | Plumbing | Phase 2 work for 624 square foot addition to rear of residence. Scope of work includes removing former rear addition to deck and reconstructing new family room/master bedroom and master bath addition. | $1,300 | [PMT2009-04123-PLB](https://nearbypermits.com/boulder/permit/PMT2009-04123-PLB/) | | Nov 16, 2009 | Mechanical (HVAC) | Phase 2 work for 624 square foot addition to rear of residence. Scope of work includes removing former rear addition to deck and reconstructing new family room/master bedroom and master bath addition. | $2,500 | [PMT2009-04123-MEC](https://nearbypermits.com/boulder/permit/PMT2009-04123-MEC/) | | Nov 16, 2009 | Electrical | Phase 2 work for 624 square foot addition to rear of residence. Scope of work includes removing former rear addition to deck and reconstructing new family room/master bedroom and master bath addition. | $1,000 | [PMT2009-04123-ELE](https://nearbypermits.com/boulder/permit/PMT2009-04123-ELE/) | | Nov 16, 2009 | Addition | Phase 2 work for 624 square foot addition to rear of residence. Scope of work includes removing former rear addition to deck and reconstructing new family room/master bedroom and master bath addition. | $59,924 | [PMT2009-04123](https://nearbypermits.com/boulder/permit/PMT2009-04123/) | | Sep 25, 2009 | Plumbing | Interior remodel of 1100 sf in portion of house built in 1901. (See approved LAC.) (Approved for Phase 1 work ONLY this permit.) Rehabilitation/restoration of front porch, create new door opening on west side, restoration of soffit & fascia. Tear-off & reroof of structure. | $1,200 | [PMT2009-03605-PLB](https://nearbypermits.com/boulder/permit/PMT2009-03605-PLB/) | | Sep 25, 2009 | Mechanical (HVAC) | Interior remodel of 1100 sf in portion of house built in 1901. (See approved LAC.) (Approved for Phase 1 work ONLY this permit.) Rehabilitation/restoration of front porch, create new door opening on west side, restoration of soffit & fascia. Tear-off & reroof of structure. | $2,500 | [PMT2009-03605-MEC](https://nearbypermits.com/boulder/permit/PMT2009-03605-MEC/) | | Sep 25, 2009 | Electrical | Interior remodel of 1100 sf in portion of house built in 1901. (See approved LAC.) (Approved for Phase 1 work ONLY this permit.) Rehabilitation/restoration of front porch, create new door opening on west side, restoration of soffit & fascia. Tear-off & reroof of structure. | $1,000 | [PMT2009-03605-ELE](https://nearbypermits.com/boulder/permit/PMT2009-03605-ELE/) | | Sep 25, 2009 | Alteration or repair | Interior remodel of 1100 sf in portion of house built in 1901. (See approved LAC.) (Approved for Phase 1 work ONLY this permit.) Rehabilitation/restoration of front porch, create new door opening on west side, restoration of soffit & fascia. Tear-off & reroof of structure. | $52,751 | [PMT2009-03605](https://nearbypermits.com/boulder/permit/PMT2009-03605/) | | Jul 17, 2009 | Demolition | Demo Permit - For interior non-structural demo of walls, bathrooms, and most fixtures in historic house. (See HIS cases). | Not listed | [PMT2009-02754-DEM](https://nearbypermits.com/boulder/permit/PMT2009-02754-DEM/) | | Oct 21, 2008 | Mechanical (HVAC) | Replacement Forced Air Furnace | $1,836 | [PMT2008-20244-MEC](https://nearbypermits.com/boulder/permit/PMT2008-20244-MEC/) | | Oct 23, 1987 | Mechanical (HVAC) | Mechanical replace water heater | $350 | [PMT1987-M4738-MEC](https://nearbypermits.com/boulder/permit/PMT1987-M4738-MEC/) | --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 10:56 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 14 permits at this address: https://nearbypermits.com/boulder/address/1818-walnut-st/