# Building permits at 84 Mountain Av, Boston, MA

The biggest project within a quarter mile since May 1: a $565,200 project at 2-26 Marden Av, permitted Jun 4.

Six permits on record here. The newest, Sep 8, 2025: Replace existing farmers porch leaving the existing roof intact. Within a quarter mile, the city has issued 65 more permits (61 projects) since May 1.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Sep 8, 2025 | Alteration or repair | Replace existing farmers porch leaving the existing roof intact. | $44,500 | [SF1772703](https://nearbypermits.com/boston/permit/SF1772703/) |
| Jan 14, 2021 | Alteration or repair | Entire;building gutted by previous owner- New owner;new electrical, plumbing and heating system, sheet rocking entire interior, three bathrooms and one kitchen. basement is framed by previous owner. Non finish basement; | $95,000 | [SF1134354](https://nearbypermits.com/boston/permit/SF1134354/) |
| Jan 6, 2021 | Electrical | Rewire the entire house with new lights, outlets and switches | $6,500 | [E1150013](https://nearbypermits.com/boston/permit/E1150013/) |
| Nov 24, 2020 | Plumbing | install 3 new full bathroom 1 kitchen | $10,000 | [PL1140064](https://nearbypermits.com/boston/permit/PL1140064/) |
| Nov 24, 2020 | Plumbing | install new gas supply pip for furnace and gas stove and dryer | $3,000 | [G1140065](https://nearbypermits.com/boston/permit/G1140065/) |
| Nov 3, 2020 | Roofing | strip and reroof | $10,000 | [SF1131981](https://nearbypermits.com/boston/permit/SF1131981/) |

## Within ¼ mi since May 1, 2026

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

### Next door (under 250 ft), 10 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Sep 22, 2026 | [68 Mascot St](https://nearbypermits.com/boston/address/68-mascot-st/) | 240 ft NE | Alteration or repair | Interior renovation of an existing two-family dwelling, including two kitchens, three bathrooms, and construction of a new third-floor dormer. Work includes associated structural, plumbing, electrical, HVAC, insulation, drywall, roofing, siding, windows, and interior finishes per approved plans. | $198,000 | [ALT1874357](https://nearbypermits.com/boston/permit/ALT1874357/) |
| Sep 16, 2026 | [98 Willowwood St](https://nearbypermits.com/boston/address/98-willowwood-st/) | 190 ft SW | Plumbing | 2 Gas furnace replacements | $5,000 | [G1901062](https://nearbypermits.com/boston/permit/G1901062/) |
| Aug 31, 2026 | [84 Willowwood St](https://nearbypermits.com/boston/address/84-willowwood-st/) | 220 ft W | Plumbing | Gas furnace installation | $6,500 | [G1891727](https://nearbypermits.com/boston/permit/G1891727/) |
| Aug 25, 2026 | [92 Willowwood St](https://nearbypermits.com/boston/address/92-willowwood-st/) | 210 ft W | Roofing | Roof replacement | $18,500 | [SF1891839](https://nearbypermits.com/boston/permit/SF1891839/) |
| Aug 25, 2026 | [84 Willowwood St](https://nearbypermits.com/boston/address/84-willowwood-st/) | 220 ft W | Plumbing | tankless water heater installed | $6,500 | [PL1891738](https://nearbypermits.com/boston/permit/PL1891738/) |
| Aug 24, 2026 | [152 Ballou Av](https://nearbypermits.com/boston/address/152-ballou-av/) | 120 ft SE | Alteration or repair | complete install vinyl siding,with 3/8 insulation foam.complete install 30 vinyl double hung window.replace 6 interior door, replace four exterior door | $85,000 | [SF1889943](https://nearbypermits.com/boston/permit/SF1889943/) |
| Aug 12, 2026 | [68 Mascot St](https://nearbypermits.com/boston/address/68-mascot-st/) | 240 ft NE | Plumbing | 3 bathrooms and 2 kitchens | $8,000 | [PL1868321](https://nearbypermits.com/boston/permit/PL1868321/) |
| Jul 21, 2026 | [72 Mountain Av](https://nearbypermits.com/boston/address/72-mountain-av/) | 140 ft N | Plumbing | Replacement of gas water heater | $2,247 | [PL1874132](https://nearbypermits.com/boston/permit/PL1874132/) |
| Jul 21, 2026 | [72 Mountain Av](https://nearbypermits.com/boston/address/72-mountain-av/) | 140 ft N | Plumbing | Replacement of gas water heater | $2,247 | [G1874129](https://nearbypermits.com/boston/permit/G1874129/) |
| Jun 15, 2026 | [68 Mascot St](https://nearbypermits.com/boston/address/68-mascot-st/) | 240 ft NE | Alteration or repair | Demo of interior Kitchens and bathrooms | $5,000 | [SF1859665](https://nearbypermits.com/boston/permit/SF1859665/) |

### This block (250 to 1,000 ft), 28 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | [18 Nelson St](https://nearbypermits.com/boston/address/18-nelson-st/) | 690 ft SE | Roofing | Remove and replace: 25 sq asphalt roofing and 1 vented skylight | $26,101 | [SF1896649](https://nearbypermits.com/boston/permit/SF1896649/) |
| Sep 11, 2026 | [19 Winston Rd](https://nearbypermits.com/boston/address/19-winston-rd/) | 910 ft NW | Fire systems | Replace existing fire alarm panel with a new digital fire alarm panel and cellular communicator in a BHA owned property. Outage and reconnection will be a 6-8 hour duration. | $6,000 | [EFA1900341](https://nearbypermits.com/boston/permit/EFA1900341/) |
| Aug 24, 2026 | [46-48 Mountain Av](https://nearbypermits.com/boston/address/46--48-mountain-av/) | 500 ft N | Plumbing | remodeling three bathrooms and three kitchens on floors 1 2 and 3 | $15,000 | [PL1891402](https://nearbypermits.com/boston/permit/PL1891402/) |
| Aug 24, 2026 | [46-48 Mountain Av](https://nearbypermits.com/boston/address/46--48-mountain-av/) | 500 ft N | Plumbing | gas piping | $1,000 | [G1891408](https://nearbypermits.com/boston/permit/G1891408/) |
| Aug 14, 2026 | [19 Hildreth St](https://nearbypermits.com/boston/address/19-hildreth-st/) | 710 ft SW | Plumbing | Retest of 1st floor gas line | $1,000 | [G1887749](https://nearbypermits.com/boston/permit/G1887749/) |
| Aug 6, 2026 | [19 Hildreth St](https://nearbypermits.com/boston/address/19-hildreth-st/) | 710 ft SW | Plumbing | Gas re-test for floor #1. | $1,000 | [G1880981](https://nearbypermits.com/boston/permit/G1880981/) |
| Aug 5, 2026 | [32-36 Jacob St](https://nearbypermits.com/boston/address/32--36-jacob-st/) | 750 ft NE | Alteration or repair | Rebuild front and back stairs and decks. Same dimensions as existing. All pressure-treated wood frame. New 12"x4' footings, 42" railings, 6x6 posts, pressure-treated decking, and railings. | $44,000 | [SF1882726](https://nearbypermits.com/boston/permit/SF1882726/) |
| Jul 28, 2026 | [8-10 Nelson St](https://nearbypermits.com/boston/address/8--10-nelson-st/) | 600 ft E | Electrical | Adt will be running low voltage wiring for 1 cctv cameras | $760 | [ELV1877851](https://nearbypermits.com/boston/permit/ELV1877851/) |
| Jul 24, 2026 | [18 Crowell St](https://nearbypermits.com/boston/address/18-crowell-st/) | 910 ft E | Alteration or repair | replace rear porches to match existing | $25,000 | [SF1877343](https://nearbypermits.com/boston/permit/SF1877343/) |
| Jul 17, 2026 | [46 Jacob St](https://nearbypermits.com/boston/address/46-jacob-st/) | 640 ft NE | Roofing | Replace the existing roof and exterior siding with new materials, with no changes to the existing building structure or footprint. Replace the existing rear exterior staircase with a new staircase. Update and replace the aluminum trim around all exterior windows. | $15,000 | [SF1871213](https://nearbypermits.com/boston/permit/SF1871213/) |
| Jul 9, 2026 | [37 Mascot St](https://nearbypermits.com/boston/address/37-mascot-st/) | 630 ft N | Electrical | meter to be replaced as part of Eversource's AMI project | $1,500 | [E1870480](https://nearbypermits.com/boston/permit/E1870480/) |
| Jul 8, 2026 | [50 Winston Rd](https://nearbypermits.com/boston/address/50-winston-rd/) | 980 ft NW | Electrical | Add 2x new Counter circuits for kitchen. Running conduit from basement to unit 2Ls kitchen | $800 | [E1868763](https://nearbypermits.com/boston/permit/E1868763/) |
| Jun 29, 2026 | [53 Mascot St](https://nearbypermits.com/boston/address/53-mascot-st/) | 460 ft N | Plumbing | Replacement of 2 gas boilers in apartments 1 and 2 | $12,000 | [G1862643](https://nearbypermits.com/boston/permit/G1862643/) |
| Jun 25, 2026 | [53 Mascot St](https://nearbypermits.com/boston/address/53-mascot-st/) | 460 ft N | Plumbing | Replacement of 2 gas boilers | $12,000 | [PL1862646](https://nearbypermits.com/boston/permit/PL1862646/) |
| Jun 22, 2026 | [429 Norfolk St](https://nearbypermits.com/boston/address/429-norfolk-st/) | 760 ft SW | Electrical | Diesel generator to Power Inflatables for duration of event | $400 | [E1861796](https://nearbypermits.com/boston/permit/E1861796/) |
| Jun 18, 2026 | [46-48 Mountain Av](https://nearbypermits.com/boston/address/46--48-mountain-av/) | 500 ft N | Electrical | Upgrading previous electrical work. Roughing out 3 units and Common area, and finish work | $15,000 | [E1860105](https://nearbypermits.com/boston/permit/E1860105/) |
| Jun 11, 2026 | [17 Mascot St](https://nearbypermits.com/boston/address/17-mascot-st/) | 820 ft N | Electrical | Service UpGrade - Rewire | $10,000 | [E1860095](https://nearbypermits.com/boston/permit/E1860095/) |
| Jun 5, 2026 | [19 Jacob St](https://nearbypermits.com/boston/address/19-jacob-st/) | 920 ft NE | Alteration or repair | Removing and replacing 4 windows, replacing like with like, no structural changes. | $4,934 | [SF1854918](https://nearbypermits.com/boston/permit/SF1854918/) |
| Jun 4, 2026 | [2-26 Marden Av](https://nearbypermits.com/boston/address/2--26-marden-av/) | 620 ft NW | Roofing | remove and replace roof shingles, siding, and deck boards and rails | $565,200 | [SF1856805](https://nearbypermits.com/boston/permit/SF1856805/) |
| May 29, 2026 | [15 Jacob St](https://nearbypermits.com/boston/address/15-jacob-st/) | 960 ft NE | Plumbing | Replace gas water heater | $1,100 | [PL1853021](https://nearbypermits.com/boston/permit/PL1853021/) |
| May 29, 2026 | [15 Jacob St](https://nearbypermits.com/boston/address/15-jacob-st/) | 960 ft NE | Plumbing | Replace gas water heater | $1,100 | [G1853024](https://nearbypermits.com/boston/permit/G1853024/) |
| May 27, 2026 | [270 Norfolk St](https://nearbypermits.com/boston/address/270-norfolk-st/) | 960 ft E | Plumbing | New. 1st Floor: 2 electric water heaters, 2 kitchen sinks, 2 ice makers, 4 toilets, 4 lavatories, 2 bathtubs, and 2 washing machine connections. 2nd Floor: 2 electric water heaters, 2 kitchen sinks, 2 ice makers, 4 toilets, 4 lavatories, 2 bathtubs, and 2 washing machine connections. 3rd Floor: 2 el | $54,000 | [PL1852608](https://nearbypermits.com/boston/permit/PL1852608/) |
| May 22, 2026 | [71 Willowwood St](https://nearbypermits.com/boston/address/71-willowwood-st/) | 360 ft W | Electrical | Adding 2 meters | $6,500 | [E1849453](https://nearbypermits.com/boston/permit/E1849453/) |
| May 21, 2026 | [75 Jacob St](https://nearbypermits.com/boston/address/75-jacob-st/) | 360 ft NE | Solar | Installation of roof mounted photovoltaic solar systems, 3.28 KW 8 panels with installation of 1 Franklin battery installed on exterior of home. Work to be done at 77 Jacob St. | $42,300 | [SF1838297](https://nearbypermits.com/boston/permit/SF1838297/) |
| May 13, 2026 | [62 Mountain Av](https://nearbypermits.com/boston/address/62-mountain-av/) | 290 ft N | Electrical | Replace variable speed bath fan, with controls. Site id: cap-24820 | $2,000 | [E1848634](https://nearbypermits.com/boston/permit/E1848634/) |
| May 12, 2026 | [58 Mascot St](https://nearbypermits.com/boston/address/58-mascot-st/) | 350 ft N | Solar | Installation of roof mounted photovoltaic solar systems, 9.02 kw 22 panels with installation of 1 franklin battery installed on exterior of home | $73,800 | [SF1847292](https://nearbypermits.com/boston/permit/SF1847292/) |
| May 12, 2026 | [58 Mascot St](https://nearbypermits.com/boston/address/58-mascot-st/) | 350 ft N | Solar | Installation of roof mounted photovoltaic solar systems, 9.02 kw 22 panels with installation of 1 franklin battery installed on exterior of home | $73,800 | [E1847297](https://nearbypermits.com/boston/permit/E1847297/) |
| May 4, 2026 | [116 Evans St](https://nearbypermits.com/boston/address/116-evans-st/) | 940 ft SE | Plumbing | 1 Laundry 1 Kitchen 1 Bathroom 1 Water Heater | $4,000 | [PL1844525](https://nearbypermits.com/boston/permit/PL1844525/) |

### Farther (1,000 ft to ¼ mi), 27 permits

| Date | Address | Distance | Type | Work | Cost | Permit |
|---|---|---|---|---|---|---|
| Sep 28, 2026 | [107 Maxwell St](https://nearbypermits.com/boston/address/107-maxwell-st/) | 0.24 mi SE | Electrical | Replace 3 bath fans with new variable speed fans with smart switches | $3,600 | [E1903737](https://nearbypermits.com/boston/permit/E1903737/) |
| Sep 24, 2026 | [150 Woodrow Av](https://nearbypermits.com/boston/address/150-woodrow-av/) | 0.21 mi N | Electrical | Rewire 3rd floor apartment Add meter fir 3rd floor | $7,000 | [E1903941](https://nearbypermits.com/boston/permit/E1903941/) |
| Sep 22, 2026 | [188 Woodrow Av](https://nearbypermits.com/boston/address/188-woodrow-av/) | 0.22 mi NW | Alteration or repair | Replace existing rear wood deck with composite and PVC railing. | $10,000 | [SF1903295](https://nearbypermits.com/boston/permit/SF1903295/) |
| Sep 9, 2026 | [150 Woodrow Av](https://nearbypermits.com/boston/address/150-woodrow-av/) | 0.21 mi N | Plumbing | add bathroom and kitchen on 3rd floor | $8,000 | [PL1897655](https://nearbypermits.com/boston/permit/PL1897655/) |
| Sep 4, 2026 | [44 Capen St](https://nearbypermits.com/boston/address/44-capen-st/) | 0.24 mi E | Plumbing | Replacing (2) natural gas furnaces in basement | $6,000 | [G1897516](https://nearbypermits.com/boston/permit/G1897516/) |
| Aug 27, 2026 | [10 Sutton St](https://nearbypermits.com/boston/address/10-sutton-st/) | 0.23 mi SW | Plumbing | install: toilets, shower, lav, sink and laundry hook up | $11,000 | [PL1892884](https://nearbypermits.com/boston/permit/PL1892884/) |
| Aug 25, 2026 | [126 Woodrow Av](https://nearbypermits.com/boston/address/126-woodrow-av/) | 0.24 mi N | Alteration or repair | replace all old PT flooring &; rails on first floor decks. install new composite 5/4 X6 composite flooring &; rails, rebuild 2nd floor balcony using 2X 10 PT joist Supported on existing 1st floor deck on 2- 6X6 column, new composite 5/4 X 6 flooring &; rails. existing 1st floor framing to remain. No | $24,000 | [SF1891478](https://nearbypermits.com/boston/permit/SF1891478/) |
| Aug 14, 2026 | [253 Norfolk St](https://nearbypermits.com/boston/address/253-norfolk-st/) | 0.20 mi E | Alteration or repair | Repair existing front and rear porches by removing columns,flooring,railing and install new columns,flooring railing and steps. | $45,000 | [SF1888095](https://nearbypermits.com/boston/permit/SF1888095/) |
| Aug 11, 2026 | [71 Ballou Av](https://nearbypermits.com/boston/address/71-ballou-av/) | 0.21 mi NE | Electrical | New 1-3 Family dwelling low voltage (data & communication) Installation | $13,000 | [ELV1879898](https://nearbypermits.com/boston/permit/ELV1879898/) |
| Aug 5, 2026 | [65 Ballou Av](https://nearbypermits.com/boston/address/65-ballou-av/) | 0.22 mi NE | Electrical | New 1-3 Family dwelling low voltage construction ( Data & Communication) | $13,000 | [ELV1879886](https://nearbypermits.com/boston/permit/ELV1879886/) |
| Aug 5, 2026 | [71 Ballou Av](https://nearbypermits.com/boston/address/71-ballou-av/) | 0.21 mi NE | Fire systems | New 1-3 Family Dwelling Fire Alarm System Installation | $15,000 | [EFA1879895](https://nearbypermits.com/boston/permit/EFA1879895/) |
| Jul 30, 2026 | [65 Ballou Av](https://nearbypermits.com/boston/address/65-ballou-av/) | 0.22 mi NE | Fire systems | New 1-3 Family Dwelling Fire Alarm System Installation | $15,000 | [EFA1879887](https://nearbypermits.com/boston/permit/EFA1879887/) |
| Jul 30, 2026 | [71 Ballou Av](https://nearbypermits.com/boston/address/71-ballou-av/) | 0.21 mi NE | Electrical | New 1-3 Family Dwelling Electrical construction with 400A service | $55,000 | [E1879891](https://nearbypermits.com/boston/permit/E1879891/) |
| Jul 30, 2026 | [65 Ballou Av](https://nearbypermits.com/boston/address/65-ballou-av/) | 0.22 mi NE | Electrical | New 1-3 Family Dwelling Electrical Construction with 400A Service | $55,000 | [E1879884](https://nearbypermits.com/boston/permit/E1879884/) |
| Jul 8, 2026 | [64 Nelson St](https://nearbypermits.com/boston/address/64-nelson-st/) | 0.23 mi SE | Solar | Install 6.6kW DC (15 panels) rooftop solar array | $22,241 | [SF1867227](https://nearbypermits.com/boston/permit/SF1867227/) |
| Jul 8, 2026 | [64 Nelson St](https://nearbypermits.com/boston/address/64-nelson-st/) | 0.23 mi SE | Solar | install 6.6kW DC (15 panels) rooftop solar array | $7,414 | [E1868016](https://nearbypermits.com/boston/permit/E1868016/) |
| Jul 7, 2026 | [107 Maxwell St](https://nearbypermits.com/boston/address/107-maxwell-st/) | 0.24 mi SE | Alteration or repair | Mass Save Replacement of 16 Windows | $11,200 | [SF1863331](https://nearbypermits.com/boston/permit/SF1863331/) |
| Jul 7, 2026 | [107 Maxwell St](https://nearbypermits.com/boston/address/107-maxwell-st/) | 0.24 mi SE | Alteration or repair | Mass Save Insulation & Air Sealing. No Structural Changes. | $28,893 | [SF1861374](https://nearbypermits.com/boston/permit/SF1861374/) |
| Jul 6, 2026 | [262 Norfolk St](https://nearbypermits.com/boston/address/262-norfolk-st/) | 0.19 mi E | Electrical | Wiring whole building, 3 family | $37,900 | [E1867382](https://nearbypermits.com/boston/permit/E1867382/) |
| Jul 4, 2026 | [12 Verrill St](https://nearbypermits.com/boston/address/12-verrill-st/) | 0.23 mi SW | Solar | Installation of roof mount solar system | $45,633 | [SF1850934](https://nearbypermits.com/boston/permit/SF1850934/) |
| Jul 1, 2026 | [12 Verrill St](https://nearbypermits.com/boston/address/12-verrill-st/) | 0.23 mi SW | Solar | Install 26 solar panels 10.66 kW | $45,633 | [E1850926](https://nearbypermits.com/boston/permit/E1850926/) |
| Jun 26, 2026 | [107 Maxwell St](https://nearbypermits.com/boston/address/107-maxwell-st/) | 0.24 mi SE | Roofing | Remove existing roof shingles replace with new roof shingles. | $17,500 | [SF1861944](https://nearbypermits.com/boston/permit/SF1861944/) |
| Jun 22, 2026 | [11 Capen St](https://nearbypermits.com/boston/address/11-capen-st/) | 0.20 mi E | Electrical | Wiring whole place | $45,000 | [E1856554](https://nearbypermits.com/boston/permit/E1856554/) |
| Jun 3, 2026 | [253 Norfolk St](https://nearbypermits.com/boston/address/253-norfolk-st/) | 0.20 mi E | Roofing | Strip roofing asphalt shingles, Repair and install new asphalt shingles. | $25,000 | [SF1857388](https://nearbypermits.com/boston/permit/SF1857388/) |
| May 15, 2026 | [157 Woodrow Av](https://nearbypermits.com/boston/address/157-woodrow-av/) | 0.23 mi N | Alteration or repair | Remove and replace 27 windows, like for like, same size, no structural changes | $39,199 | [SF1849299](https://nearbypermits.com/boston/permit/SF1849299/) |
| May 6, 2026 | [93 Corbet St](https://nearbypermits.com/boston/address/93-corbet-st/) | 0.22 mi SE | Electrical | Low voltage alarm install | $1,200 | [ELV1845676](https://nearbypermits.com/boston/permit/ELV1845676/) |
| May 5, 2026 | [167 Woodrow Av](https://nearbypermits.com/boston/address/167-woodrow-av/) | 0.23 mi N | Electrical | Wire two tankless. | $800 | [E1844655](https://nearbypermits.com/boston/permit/E1844655/) |

## More on this street

Other addresses on Mountain Av with permits, nearest house number first:

- [87-89 Mountain Av](https://nearbypermits.com/boston/address/87--89-mountain-av/): newest permit Jan 28, 2025
- [73 Mountain Av](https://nearbypermits.com/boston/address/73-mountain-av/): newest permit Apr 11, 2025
- [72 Mountain Av](https://nearbypermits.com/boston/address/72-mountain-av/): newest permit Jul 21, 2026
- [66 Mountain Av](https://nearbypermits.com/boston/address/66-mountain-av/): newest permit May 27, 2025
- [65 Mountain Av](https://nearbypermits.com/boston/address/65-mountain-av/): newest permit Jul 10, 2025
- [62 Mountain Av](https://nearbypermits.com/boston/address/62-mountain-av/): newest permit May 13, 2026
- [54 Mountain Av](https://nearbypermits.com/boston/address/54-mountain-av/): newest permit Mar 5, 2026
- [46-48 Mountain Av](https://nearbypermits.com/boston/address/46--48-mountain-av/): newest permit Aug 24, 2026
- [40 Mountain Av](https://nearbypermits.com/boston/address/40-mountain-av/): newest permit Dec 19, 2024
- [28 Mountain Av](https://nearbypermits.com/boston/address/28-mountain-av/): newest permit Mar 4, 2026

---
Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 23:02 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Map, all 6 permits at this address and 65 nearby: https://nearbypermits.com/boston/address/84-mountain-av/