# Building permits at 21 Montclair Av, Boston, MA

Five permits on record here. The newest, Feb 18: Roughing a second floor bathroom toilet, lav tub. Within a quarter mile, the city has issued 67 more permits since May 1.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Feb 18, 2026 | Plumbing | Roughing a second floor bathroom toilet, lav tub | $2,500 | [PL1821831](https://nearbypermits.com/boston/permit/PL1821831/) |
| Feb 10, 2026 | Alteration or repair | Bathroom Remodel | $1,500 | [E1818315](https://nearbypermits.com/boston/permit/E1818315/) |
| Jan 9, 2026 | Alteration or repair | Bathroom remodel project - Gut bathroom to studs, insulate walls, new wallboard/plaster, new tub, tile shower walls, tile bathroom walls/floors, new plumbing fixtures, minor electrical, vent fan out, replace trim, paint | $38,000 | [SF1810085](https://nearbypermits.com/boston/permit/SF1810085/) |
| Jun 6, 2021 | Alteration or repair | Vinyl siding installation Strip entire house of wood siding down to substrate Install Blue Skin VP 100 vapor barrier Install Grayne Composite PCV siding Install new downspouts and gutters | $40,000 | [SF1201823](https://nearbypermits.com/boston/permit/SF1201823/) |
| Mar 29, 2021 | Alteration or repair | install cellulose insulation in ext walls and attic, airsealing and weatherization | $8,438 | [SF1176295](https://nearbypermits.com/boston/permit/SF1176295/) |

## Within ¼ mi since May 1, 2026

67 permits in the circle. From our copy of the city's data (last 24 months).

### This block (250 to 1,000 ft), 42 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | [27 Ainsworth St](https://nearbypermits.com/boston/address/27-ainsworth-st/) | 730 ft SE | Electrical | Wiring of 6 ductless mini splits and 2 outdoor condensers. 400A service upgrade, work request #: 29142193 | $9,000 | [E1903966](https://nearbypermits.com/boston/permit/E1903966/) |
| Sep 24, 2026 | [34-36 Guernsey St](https://nearbypermits.com/boston/address/34--36-guernsey-st/) | 610 ft S | Alteration or repair | Residential weatherization/air sealing. No structural changes. (Site ID-885032) (Unit-2) | $4,000 | [SF1900036](https://nearbypermits.com/boston/permit/SF1900036/) |
| Sep 24, 2026 | [17 Ravenna Rd](https://nearbypermits.com/boston/address/17-ravenna-rd/) | 910 ft N | Plumbing | replacing shower stall | $1,500 | [PL1903394](https://nearbypermits.com/boston/permit/PL1903394/) |
| Sep 22, 2026 | [17 Ravenna Rd](https://nearbypermits.com/boston/address/17-ravenna-rd/) | 910 ft N | Other | shower to shower | $21,795 | [SF1900200](https://nearbypermits.com/boston/permit/SF1900200/) |
| Sep 22, 2026 | [27 Ainsworth St](https://nearbypermits.com/boston/address/27-ainsworth-st/) | 730 ft SE | Other | Installing 6 indoor mini split heads and 2 outdoor condensers. 6 heads and 1 condenser in unit 1 and 6 heads and 1 condenser in unit 2. | $72,000 | [SF1900146](https://nearbypermits.com/boston/permit/SF1900146/) |
| Sep 18, 2026 | [55 Montclair Av](https://nearbypermits.com/boston/address/55-montclair-av/) | 450 ft NE | Plumbing | Gas Piping | $300 | [G1902034](https://nearbypermits.com/boston/permit/G1902034/) |
| Sep 18, 2026 | [1 Church St](https://nearbypermits.com/boston/address/1-church-st/) | 950 ft SW | Plumbing | Install Bosch Gas Furnace in the Basement. | $2,500 | [G1897444](https://nearbypermits.com/boston/permit/G1897444/) |
| Sep 16, 2026 | [1489 Centre St](https://nearbypermits.com/boston/address/1489-centre-st/) | 960 ft NE | Roofing | strip and re roofWork to be done at secondary address 1487 Centre | $15,000 | [SF1901684](https://nearbypermits.com/boston/permit/SF1901684/) |
| Sep 15, 2026 | [1 Church St](https://nearbypermits.com/boston/address/1-church-st/) | 950 ft SW | Electrical | Wire a 10.1 KW heat pump & gas fed furnace. | $1,000 | [E1900262](https://nearbypermits.com/boston/permit/E1900262/) |
| Sep 10, 2026 | [58 Ainsworth St](https://nearbypermits.com/boston/address/58-ainsworth-st/) | 340 ft SE | Alteration or repair | rebuild existing rear firs and second floor rear decks replace existing brick foot pairs with concrete four feet below grade one foot above | $26,000 | [SF1886029](https://nearbypermits.com/boston/permit/SF1886029/) |
| Sep 2, 2026 | [50 Cerdan Av](https://nearbypermits.com/boston/address/50-cerdan-av/) | 380 ft N | Alteration or repair | Insulation work as part of the MASS Save program. | $6,000 | [SF1887227](https://nearbypermits.com/boston/permit/SF1887227/) |
| Aug 21, 2026 | [14 Guernsey St](https://nearbypermits.com/boston/address/14-guernsey-st/) | 430 ft SE | Plumbing | Renew bath | $3,000 | [PL1889872](https://nearbypermits.com/boston/permit/PL1889872/) |
| Aug 14, 2026 | [26 Cerdan Av](https://nearbypermits.com/boston/address/26-cerdan-av/) | 950 ft N | Addition | Additional rear structure, interior renovation | $150,000 | [ALT1867779](https://nearbypermits.com/boston/permit/ALT1867779/) |
| Aug 6, 2026 | [61 Sunset Hill Rd](https://nearbypermits.com/boston/address/61-sunset-hill-rd/) | 860 ft NW | Plumbing | gas dryer replacement | $250 | [G1883460](https://nearbypermits.com/boston/permit/G1883460/) |
| Aug 3, 2026 | [75 Montclair Av](https://nearbypermits.com/boston/address/75-montclair-av/) | 710 ft NE | Addition | 1st floor family room addition off back of house | $144,616 | [ALT1796444](https://nearbypermits.com/boston/permit/ALT1796444/) |
| Jul 31, 2026 | [35 Ainsworth St](https://nearbypermits.com/boston/address/35-ainsworth-st/) | 630 ft SE | Fire systems | New Fire alarm System for a 3 family unit | $18,500 | [EFA1880522](https://nearbypermits.com/boston/permit/EFA1880522/) |
| Jul 22, 2026 | [23 Pleasant Valley Ci](https://nearbypermits.com/boston/address/23-pleasant-valley-ci/) | 960 ft W | Alteration or repair | Strip and re-siding: CertainTeed Monogram Double 4" vinyl siding | $22,250 | [SF1874176](https://nearbypermits.com/boston/permit/SF1874176/) |
| Jul 22, 2026 | [1047 South St](https://nearbypermits.com/boston/address/1047-south-st/) | 730 ft S | Alteration or repair | Install 2 replacement windows - no structural work | $3,647 | [SF1868037](https://nearbypermits.com/boston/permit/SF1868037/) |
| Jul 22, 2026 | [1500 Centre St](https://nearbypermits.com/boston/address/1500-centre-st/) | 930 ft NE | Alteration or repair | Residential weatherization/air sealing. No structural changes.-(872006) (Unit-1) | $2,000 | [SF1863780](https://nearbypermits.com/boston/permit/SF1863780/) |
| Jul 10, 2026 | [35 Ainsworth St](https://nearbypermits.com/boston/address/35-ainsworth-st/) | 630 ft SE | Electrical | Complete electrical installation for the new third-floor apartment, including new panel, branch circuits, lighting, receptacles, kitchen, bathroom, laundry, smoke/CO detectors, dedicated appliance circuits, and connection to new 400A service. | $28,600 | [E1868101](https://nearbypermits.com/boston/permit/E1868101/) |
| Jul 7, 2026 | [35 Ainsworth St](https://nearbypermits.com/boston/address/35-ainsworth-st/) | 630 ft SE | Plumbing | Install plumbing fixtures and complete final connections to existing rough plumbing for 3rd floor apartment | $1,000 | [PL1868760](https://nearbypermits.com/boston/permit/PL1868760/) |
| Jun 30, 2026 | [74 Bradfield Av](https://nearbypermits.com/boston/address/74-bradfield-av/) | 400 ft E | Electrical | Low voltage alarm install | $1,200 | [ELV1863624](https://nearbypermits.com/boston/permit/ELV1863624/) |
| Jun 30, 2026 | [94 Fletcher St](https://nearbypermits.com/boston/address/94-fletcher-st/) | 880 ft E | Electrical | Fitup basement light, outlet, switch, baseboard heat | $6,000 | [E1867565](https://nearbypermits.com/boston/permit/E1867565/) |
| Jun 29, 2026 | [16 Glenburnie Rd](https://nearbypermits.com/boston/address/16-glenburnie-rd/) | 860 ft N | Other | Installing 5 zone ductless mini split system | $23,752 | [SF1860309](https://nearbypermits.com/boston/permit/SF1860309/) |
| Jun 26, 2026 | [75 Congreve St](https://nearbypermits.com/boston/address/75-congreve-st/) | 790 ft E | Plumbing | Irrigation install | $600 | [PL1864762](https://nearbypermits.com/boston/permit/PL1864762/) |
| Jun 23, 2026 | [14 Guernsey St](https://nearbypermits.com/boston/address/14-guernsey-st/) | 430 ft SE | Addition | Wiring for new Family room, office and half bathroom | $4,300 | [E1861540](https://nearbypermits.com/boston/permit/E1861540/) |
| Jun 15, 2026 | [35 Ainsworth St](https://nearbypermits.com/boston/address/35-ainsworth-st/) | 630 ft SE | Alteration or repair | Change Occupancy from 2 family dwelling to a 3 family dwelling by adding new unit in existing third floor. New dormer on the 3rd Floor to the left.[ePlans] | $50,000 | [ALT1784843](https://nearbypermits.com/boston/permit/ALT1784843/) |
| Jun 12, 2026 | [16 Glenburnie Rd](https://nearbypermits.com/boston/address/16-glenburnie-rd/) | 860 ft N | Electrical | Wiring condenser for mini split system | $2,000 | [E1860299](https://nearbypermits.com/boston/permit/E1860299/) |
| Jun 11, 2026 | [16 Glenburnie Rd](https://nearbypermits.com/boston/address/16-glenburnie-rd/) | 860 ft N | Alteration or repair | Weatherization, Insulation, Air Sealing | $11,415 | [SF1857834](https://nearbypermits.com/boston/permit/SF1857834/) |
| Jun 9, 2026 | [57 Sunset Hill Rd](https://nearbypermits.com/boston/address/57-sunset-hill-rd/) | 800 ft NW | Electrical | Wire bathroom | $3,000 | [E1858746](https://nearbypermits.com/boston/permit/E1858746/) |
| Jun 4, 2026 | [57 Sunset Hill Rd](https://nearbypermits.com/boston/address/57-sunset-hill-rd/) | 800 ft NW | Plumbing | Replacement of second floor toilet, sink and tub | $2,500 | [PL1857340](https://nearbypermits.com/boston/permit/PL1857340/) |
| Jun 2, 2026 | [84 Montclair Av](https://nearbypermits.com/boston/address/84-montclair-av/) | 810 ft NE | Plumbing | Repairing retesting stove and gas main, plus leaks. | $2,000 | [G1856871](https://nearbypermits.com/boston/permit/G1856871/) |
| Jun 1, 2026 | [57 Sunset Hill Rd](https://nearbypermits.com/boston/address/57-sunset-hill-rd/) | 800 ft NW | Alteration or repair | Replace tub, diverter valve, window, sheetrock and flooring in the second floor hall bathroom. | $39,000 | [SF1856202](https://nearbypermits.com/boston/permit/SF1856202/) |
| May 31, 2026 | [48 Bradfield Av](https://nearbypermits.com/boston/address/48-bradfield-av/) | 810 ft SE | Alteration or repair | Supply and install Hardie wrap vapor barrier on the entire house and tape at the seams Supply and install Zip flashing tape around all openings Supply and install new standard PVC mounting blocks (light, meter, plug plate, hose bib, etc...) Supply and install 5/4 x 4" Azek PVC trim and Azek sill on | $65,146 | [SF1845285](https://nearbypermits.com/boston/permit/SF1845285/) |
| May 26, 2026 | [19 Peak Hill Rd](https://nearbypermits.com/boston/address/19-peak-hill-rd/) | 780 ft NW | Alteration or repair | Residential weatherization/air sealing. No structural changes. ( 653998642) | $9,000 | [SF1847765](https://nearbypermits.com/boston/permit/SF1847765/) |
| May 19, 2026 | [1529 Centre St](https://nearbypermits.com/boston/address/1529-centre-st/) | 510 ft NE | Roofing | Strip and re-roof | $16,400 | [SF1845639](https://nearbypermits.com/boston/permit/SF1845639/) |
| May 19, 2026 | [19 Peak Hill Rd](https://nearbypermits.com/boston/address/19-peak-hill-rd/) | 780 ft NW | Electrical | Wiring of a 48BTU ductless heat pump with 5 indoor heads. | $800 | [E1850849](https://nearbypermits.com/boston/permit/E1850849/) |
| May 18, 2026 | [14 Sunset Hill Rd](https://nearbypermits.com/boston/address/14-sunset-hill-rd/) | 330 ft SW | Plumbing | water piping for boiler replacement + superstore | $6,500 | [PL1849240](https://nearbypermits.com/boston/permit/PL1849240/) |
| May 18, 2026 | [14 Sunset Hill Rd](https://nearbypermits.com/boston/address/14-sunset-hill-rd/) | 330 ft SW | Plumbing | gas boiler replacement | $6,500 | [G1849239](https://nearbypermits.com/boston/permit/G1849239/) |
| May 13, 2026 | [14 Guernsey St](https://nearbypermits.com/boston/address/14-guernsey-st/) | 430 ft SE | Alteration or repair | Close the deck to turn into a livable space. Add a bathroom. | $121,334 | [ALT1823311](https://nearbypermits.com/boston/permit/ALT1823311/) |
| May 7, 2026 | [1060 South St](https://nearbypermits.com/boston/address/1060-south-st/) | 850 ft S | Roofing | Strip and re-shingle existing asphalt roof. Replace upper and lower rubber roofs with new EPDM rubber roof system. Replace existing gutters. Homeowner is receiving funding using Emergency Home Repair Program | $67,925 | [SF1845521](https://nearbypermits.com/boston/permit/SF1845521/) |
| May 4, 2026 | [14 Sunset Hill Rd](https://nearbypermits.com/boston/address/14-sunset-hill-rd/) | 330 ft SW | Electrical | Service change | $8,600 | [E1845380](https://nearbypermits.com/boston/permit/E1845380/) |

### Farther (1,000 ft to ¼ mi), 25 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | [10 Ravenna Rd](https://nearbypermits.com/boston/address/10-ravenna-rd/) | 0.19 mi N | Alteration or repair | Remove exisitng siding and install new siding | $25,750 | [SF1901158](https://nearbypermits.com/boston/permit/SF1901158/) |
| Oct 1, 2026 | [77 Fletcher St](https://nearbypermits.com/boston/address/77-fletcher-st/) | 0.21 mi E | Alteration or repair | Install 13 replacement windows. non structural | $10,710 | [SF1900858](https://nearbypermits.com/boston/permit/SF1900858/) |
| Sep 21, 2026 | [203 Weld St](https://nearbypermits.com/boston/address/203-weld-st/) | 0.25 mi N | Alteration or repair | To grind out and remove loose mortar from foundation and replace fresh mortar in foundation joints,power wash and clean up debris | $10,450 | [SF1895963](https://nearbypermits.com/boston/permit/SF1895963/) |
| Sep 21, 2026 | [203 Weld St](https://nearbypermits.com/boston/address/203-weld-st/) | 0.25 mi N | Plumbing | small gas leak repair | $1,000 | [G1901729](https://nearbypermits.com/boston/permit/G1901729/) |
| Sep 4, 2026 | [1652 Centre St](https://nearbypermits.com/boston/address/1652-centre-st/) | 0.21 mi SW | Electrical | 3 total bathroom renovations. new switches, vanity lights, bathroom fan, and GFCI receptacles | $1,500 | [E1896674](https://nearbypermits.com/boston/permit/E1896674/) |
| Sep 3, 2026 | [24 Cerdan Av](https://nearbypermits.com/boston/address/24-cerdan-av/) | 0.19 mi N | Alteration or repair | Remove and replace 4 windows; like for like size; no structural changes | $14,105 | [SF1889801](https://nearbypermits.com/boston/permit/SF1889801/) |
| Sep 1, 2026 | [24 Cerdan Av](https://nearbypermits.com/boston/address/24-cerdan-av/) | 0.19 mi N | Alteration or repair | Install 3 windows for replacement. No structural changes. | $7,975 | [SF1896327](https://nearbypermits.com/boston/permit/SF1896327/) |
| Aug 19, 2026 | [118-120 Tyndale St](https://nearbypermits.com/boston/address/118--120-tyndale-st/) | 0.21 mi S | Plumbing | Renovation bathrooms, kitchen | $2,500 | [PL1889950](https://nearbypermits.com/boston/permit/PL1889950/) |
| Jul 29, 2026 | [118-120 Tyndale St](https://nearbypermits.com/boston/address/118--120-tyndale-st/) | 0.21 mi S | Plumbing | Reconnect gas range on 2nd floor | $1,500 | [G1875709](https://nearbypermits.com/boston/permit/G1875709/) |
| Jul 22, 2026 | [203 Weld St](https://nearbypermits.com/boston/address/203-weld-st/) | 0.25 mi N | Alteration or repair | To grind out loose mortar and repoint joints on chimney from basement to chimney top | $5,500 | [SF1874191](https://nearbypermits.com/boston/permit/SF1874191/) |
| Jul 22, 2026 | [61 Guernsey St](https://nearbypermits.com/boston/address/61-guernsey-st/) | 0.20 mi SW | Roofing | Remove existing roofing from main house and front/rear porch, installation of new ice & water shield, installation of new white aluminum drip edge, installation of new ridge vent caps, installation of new landmark roofing shingles | $11,950 | [SF1874027](https://nearbypermits.com/boston/permit/SF1874027/) |
| Jul 10, 2026 | [1476 Centre St](https://nearbypermits.com/boston/address/1476-centre-st/) | 0.22 mi NE | Plumbing | gas furnace | $2,500 | [G1871100](https://nearbypermits.com/boston/permit/G1871100/) |
| Jul 9, 2026 | [16-18 Bradfield Av](https://nearbypermits.com/boston/address/16--18-bradfield-av/) | 0.22 mi SE | Plumbing | New full plumbing installation located on unit#16 = One full bathroom, one laundry connection box. | $6,500 | [PL1867944](https://nearbypermits.com/boston/permit/PL1867944/) |
| Jul 2, 2026 | [118-120 Tyndale St](https://nearbypermits.com/boston/address/118--120-tyndale-st/) | 0.21 mi S | Alteration or repair | kitchen & bath remodel, light demolition, new cabinets. | $25,000 | [SF1859881](https://nearbypermits.com/boston/permit/SF1859881/) |
| Jun 28, 2026 | [16-18 Bradfield Av](https://nearbypermits.com/boston/address/16--18-bradfield-av/) | 0.22 mi SE | Electrical | First floor addition of a bathroom and adjacent laundry room | $3,000 | [E1864611](https://nearbypermits.com/boston/permit/E1864611/) |
| Jun 24, 2026 | [118-120 Tyndale St](https://nearbypermits.com/boston/address/118--120-tyndale-st/) | 0.21 mi S | Electrical | Installation of recessed lighting throughout first floor of apartment. Renovation of kitchen and bathroom. Addition of sub panel in basement to accommodate new kitchen circuitry. | $9,000 | [E1863715](https://nearbypermits.com/boston/permit/E1863715/) |
| Jun 19, 2026 | [100 Tyndale St](https://nearbypermits.com/boston/address/100-tyndale-st/) | 0.21 mi S | Alteration or repair | Insulate walls from interior | $3,228 | [SF1847770](https://nearbypermits.com/boston/permit/SF1847770/) |
| Jun 16, 2026 | [52 Fletcher St](https://nearbypermits.com/boston/address/52-fletcher-st/) | 0.25 mi E | Plumbing | gas stove replacement | $750 | [G1859741](https://nearbypermits.com/boston/permit/G1859741/) |
| Jun 15, 2026 | [52 Fletcher St](https://nearbypermits.com/boston/address/52-fletcher-st/) | 0.25 mi E | Plumbing | Fixture replacement-d/w, garbage disposal, sink | $2,500 | [PL1859736](https://nearbypermits.com/boston/permit/PL1859736/) |
| Jun 5, 2026 | [9 Burnside Av](https://nearbypermits.com/boston/address/9-burnside-av/) | 0.24 mi NW | Alteration or repair | Removal and proper disposal of (16) existing windows. Furnish and install (16) harvey(tm) vinyl replacement windows w/ low-e/argon, grids-between-glass. | $12,500 | [SF1855994](https://nearbypermits.com/boston/permit/SF1855994/) |
| Jun 1, 2026 | [7 Cerdan Av](https://nearbypermits.com/boston/address/7-cerdan-av/) | 0.24 mi N | Alteration or repair | Clean Joe will be removing all affected drywalls, ceilings, and floors to clean up and prevent further damages. Interior finishes only. | $2,000 | [SF1852614](https://nearbypermits.com/boston/permit/SF1852614/) |
| May 29, 2026 | [52 Fletcher St](https://nearbypermits.com/boston/address/52-fletcher-st/) | 0.25 mi E | Alteration or repair | Kitchen remodel Labor and assembly. Non-structural. | $13,350 | [SF1847310](https://nearbypermits.com/boston/permit/SF1847310/) |
| May 21, 2026 | [52 Fletcher St](https://nearbypermits.com/boston/address/52-fletcher-st/) | 0.25 mi E | Electrical | Adding a dedicated circuit for a microwave. Short run 20' with dual function breaker | $500 | [E1850947](https://nearbypermits.com/boston/permit/E1850947/) |
| May 20, 2026 | [142 Tyndale St](https://nearbypermits.com/boston/address/142-tyndale-st/) | 0.22 mi S | Alteration or repair | install 3500sq ft siding including trim - no structural changes | $121,012 | [SF1847487](https://nearbypermits.com/boston/permit/SF1847487/) |
| May 5, 2026 | [1652 Centre St](https://nearbypermits.com/boston/address/1652-centre-st/) | 0.21 mi SW | Plumbing | Replacing toilet flange and stop Replacing shower valve and drain Move tub drain over Install new stand alone tub Install vanity Install toilet | $4,000 | [PL1843862](https://nearbypermits.com/boston/permit/PL1843862/) |

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-05 18:57 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Map, all 5 permits at this address and 67 nearby: https://nearbypermits.com/boston/address/21-montclair-av/