21 Mayfield St

Boston, MA 02125

At this address

1 permit in the last two years. Newest issued Oct 13: The owner seeks to subdivide the existing 11,746 Square foot lot into…

Within ¼ mile

86 more permits issued since May 1.

Biggest nearby

A $575,000 alteration or repair at 17 Buttonwood St, permitted Aug 26, within ¼ mile since May 1.

The city's data portal didn't answer in time. "Here" shows our copy of the last two years, which we checked 2026-10-15 14:40 UTC. Data status

1. The owner seeks to subdivide the existing 11,746 Square foot lot into two new lots

   Alteration or repair
   Oct 13$500

1. Temp Generator power for film production

   16 Taft St · 180 ft N · Electrical
   Oct 3$500
2. Bath tub removal, new install, tile, window stone 8 taft unit # 1

   8 Taft St · 190 ft NE · Alteration or repair
   Aug 11$10,571

1. Adding 122' feet fencing

   20 Victoria St · 480 ft SW · Alteration or repair
   Oct 13$7,840
2. Remove and replace rear porches to be same size and shape

   25 Harbor View St · 630 ft E · Alteration or repair
   Oct 1$20,000
3. New bedroom addition, with a center light

   944 Dorchester Av · 730 ft NE · Electrical
   Oct 1$4,500
4. Amendment to ALT1782865 to show additional bathroom on each floor of the renovated property

   7 Thornley St · 880 ft S · Alteration or repair
   Sep 30$18,000
5. Installation of new siding and windows

   4 Victoria St · 440 ft S · Alteration or repair
   Sep 25$60,000
6. Replace kitchen sink, garbage disposal, and dishwasher

   65 Sagamore St · 1,000 ft E · Plumbing
   Sep 21$1,000
7. Strip existing siding install new vinil siding new pvc trims and fascia

   16 Grant St · 890 ft NE · Alteration or repair
   Sep 17$142,600
8. Tire off the shingles and replace for new asphalt shingles

   1048 Dorchester Av · 710 ft SE · Roofing
   Sep 15$115,000
9. Rewire whole house

   25 Harbor View St · 630 ft E · Electrical
   Sep 15$25,000
10. New waste pipe to all new fixture toilet, sink, kitchen sink, shower

    25 Harbor View St · 630 ft E · Plumbing
    Sep 9$24,000
11. New gas line to stove, hot air furnace and tankless water heater

    25 Harbor View St · 630 ft E · Plumbing
    Sep 9$10,000
12. Renovate kitchen and bathroom on all 3 floors

    25 Harbor View St · 630 ft E · Alteration or repair
    Aug 31$97,500
13. To change occupancy from three-family to four-family by converting basement level into a residential unit

    35 Sudan St · 720 ft E · Alteration or repair
    Aug 31$219,000
14. UNIT # 4 Build new Bedroom close walls create open for glass panel to be installed add pocket door at…

    944 Dorchester Av · 730 ft NE · Alteration or repair
    Aug 21$33,793
15. Installing rooftop solar PV of 3.69 KW and 9 modules

    11 Hallam St · 980 ft SE · Solar
    Aug 7$10,198
16. Working on 1 kitchen sink, 1 laundry and 4 bathroom

    20 Hinckley St · 800 ft W · Plumbing
    Aug 7$20,000
17. Installing rooftop railed solar PV 3.69KW and 9 modules

    11 Hallam St · 980 ft SE · Electrical
    Aug 7$23,796
18. Weatherization

    11 Pleasant St · 670 ft NW · Alteration or repair
    Jul 28$4,392
19. Reset vanity Reset shower faucets Reset Toilet Reset Dishwasher Reset Sink

    253 E Cottage St · 690 ft N · Plumbing
    Jul 24$1,950
20. Reset kitchen cabinet and appliances

    253 E Cottage St · 690 ft N · Alteration or repair
    Jul 17$23,740
21. Strip/reroof

    14 Grant St · 910 ft NE · Roofing
    Jul 16$15,500
22. Replacing porch

    31-33 Willis St · 980 ft NW · Alteration or repair
    Jul 15$5,000
23. Fire escape repairs remove and replace all stair threads and clips install new stair threads remove all bar…

    928 Dorchester Av · 980 ft N · Alteration or repair
    Jul 7$28,500
24. Install aluminum coil on fascia & paint soffit

    10 Crescent Av · 910 ft NE · Alteration or repair
    Jul 1$7,870
25. Supply and install Hardie wrap vapor barrier on the entire house and tape at the seams Supply and install Zip…

    5 Romsey St · 370 ft SE · Alteration or repair
    Jun 29$86,965
26. Paint entire back porch, install new PVC lattice front and back porch

    1043-1045 Dorchester Av · 610 ft S · Alteration or repair
    Jun 28$42,950
27. 100 amp replacing the disconnect and meter bank

    14 Hallam St · 930 ft SE · Electrical
    Jun 24$8,000
28. Replace 3rd floor electrical panel and troubleshooting outlets not working in the bedroom

    6-8 Belfort St · 600 ft SE · Electrical
    Jun 16$2,600
29. Renovate bathroom (Tub to Tub, lav and toilet) Address: 950 Dorchester Ave #206 Dorchester MA 02125

    946a-952 Dorchester Av · 720 ft NE · Plumbing
    Jun 12$1,500
30. Amending ERT1554519 to fix paperwork error: increasing width by 6 inches and length by 2 feet

    20 Hinckley St · 800 ft W · Alteration or repair
    Jun 11not listed
31. Install replacement tub bath system - no structural work

    944 Dorchester Av · 730 ft NE · Alteration or repair
    May 28$15,070
32. Install new EPDM roof over existing roof with 1 inch of close cell insulation

    23 Howes St · 590 ft N · Roofing
    May 27$13,400
33. Water Filtration System

    42 Pleasant St · 570 ft SW · Plumbing
    May 26$5,110
34. Install manual fire alarm system per 527 cmr 12.00 & NFPA 72

    7 Thornley St · 880 ft S · Fire systems
    May 20$12,500
35. Weatherization work through the mass save program

    11 Pleasant St · 670 ft NW · Alteration or repair
    May 15$4,339
36. Install hardwired smoke detector for 3 family house

    7 Thornley St · 880 ft S · Fire systems
    May 11$4,500
37. Upgrade the service to 200 Amp

    7 Thornley St · 880 ft S · Electrical
    May 8$50,000
38. Install a new counter top, plumbing to accommodate sink

    990-996 Dorchester Av · 300 ft E · Alteration or repair
    May 4$10,000
39. Bathroom Kitchens Laundry Water heaters

    7 Thornley St · 880 ft S · Plumbing
    May 4$15,000
40. Furnaces Water heaters Ranges

    7 Thornley St · 880 ft S · Plumbing
    May 4$6,000
41. Rewire kitchen and bathroom outlets

    253 E Cottage St · 690 ft N · Electrical
    May 1$6,400

1. Remove and replace vinyl siding

   9 Annapolis St · 0.20 mi W · Alteration or repair
   Oct 6$90,656
2. Interior demo and removal all finishes affected by the fire and water

   18 Treadway Rd · 0.21 mi S · Alteration or repair
   Oct 5$47,500
3. Gas piping for 3 tankless water heaters

   11 Annapolis St · 0.20 mi W · Plumbing
   Oct 1$5,000
4. We are going to do the vinyl siding on entire house add 3/8 insulation and install monogram vinyl siding from…

   763-765 Columbia Rd · 0.23 mi N · Alteration or repair
   Sep 21$58,800
5. Service Upgrade to 200A

   78 Harbor View St · 0.24 mi E · Electrical
   Sep 15$3,000
6. Inspect the electrical service to make sure everything is in good condition and ready for Eversource to…

   49-51 Sudan St · 0.21 mi E · Electrical
   Sep 9$300
7. Install wall and blade signs

   912-916 Dorchester Av · 0.23 mi N · Sign
   Sep 8$9,019
8. Install smoke and carbon monoxide detectors where required by law

   1078-1082 Dorchester Av · 0.20 mi S · Fire systems
   Sep 7$1,200
9. Add 3rd floor bathroom

   9 Elton St · 0.21 mi S · Plumbing
   Sep 1$3,500
10. Adding basement ADU Moving electrical panels to new mechanical room and wiring new unit

    44-46 Sagamore St · 0.19 mi SE · Electrical
    Aug 31$10,000
11. Convert existing single fam residential home to 3 family

    17 Buttonwood St · 0.23 mi NE · Alteration or repair
    Aug 26$575,000
12. Remove and replace all rotted exterior trim work

    1097-1099 Dorchester Av · 0.25 mi S · Alteration or repair
    Aug 24$50,000
13. Repair to columns

    33 Spring Garden St · 0.22 mi E · Alteration or repair
    Aug 21$1,500
14. N/R confirm occupancy of 1 FamilyNO RECORD OF OCCUPANCY;DANIEL RAE

    33 Spring Garden St · 0.22 mi E · Alteration or repair
    Aug 21not listed
15. Replaced rotted lumber on rear triple deck

    22 Buttonwood St · 0.25 mi N · Alteration or repair
    Aug 20$18,670
16. Deck Board and Railing Replacement

    11 Salcombe St · 0.23 mi SW · Alteration or repair
    Aug 7$50,812
17. 7 new full bathrooms, 3 kitchens, 3 laundries, 3 water heaters

    11 Annapolis St · 0.20 mi W · Plumbing
    Aug 4$10,000
18. Gas pipe test because new meter install by gas company

    78-80 Sudan St · 0.24 mi E · Plumbing
    Aug 4$1,800
19. Rewire house and new service

    77 Harbor View St · 0.23 mi E · Electrical
    Jul 27$30,000
20. Rewire wire house and new service

    793 Columbia Rd · 0.24 mi N · Electrical
    Jul 27$30,000
21. Rewire whole house

    791 Columbia Rd · 0.24 mi N · Electrical
    Jul 27$280,000
22. Complete bathrooms remodeling on all 3 floors including electrical and plumbing work

    77 Harbor View St · 0.23 mi E · Alteration or repair
    Jul 21$150,000
23. Replacement of 13 Windows

    14 Whitby Te · 0.23 mi SW · Alteration or repair
    Jul 20$22,589
24. Gas retest

    33-37 Bakersfield St · 0.20 mi W · Plumbing
    Jul 13$2,500
25. Renovation all plumbing of the house

    793 Columbia Rd · 0.24 mi N · Plumbing
    Jul 12$30,050
26. Repipe gas pipe for unit 1 and 2 only

    793 Columbia Rd · 0.24 mi N · Plumbing
    Jul 12$16,500
27. Low voltage wiring

    11 Annapolis St · 0.20 mi W · Electrical
    Jul 3$1,000
28. Hardwired smoke detectorsattn open building code violation at this property;v875408

    11 Annapolis St · 0.20 mi W · Fire systems
    Jul 3$1,000
29. Complete rewire of 3-family dwelling

    11 Annapolis St · 0.20 mi W · Electrical
    Jul 3$20,000
30. Remove and replace rear porch system

    201 E Cottage St · 0.25 mi NW · Alteration or repair
    Jun 24$37,000
31. I.E Install 4 double hung windows

    218-220 E Cottage St · 0.21 mi NW · Alteration or repair
    Jun 23$7,074
32. Mass Save Insulation and Air Sealing

    53 Crescent Av · 0.24 mi NE · Alteration or repair
    Jun 22$8,316
33. 3 Family full renovation per attached drawing

    793 Columbia Rd · 0.24 mi N · Alteration or repair
    Jun 8$315,000
34. Install a UL Central station fire alarm system

    793 Columbia Rd · 0.24 mi N · Fire systems
    Jun 4$5,000
35. Install an ew UL Central station fire alarm system

    791 Columbia Rd · 0.24 mi N · Fire systems
    Jun 4$5,000
36. Insulation work as part of the MASS Save program

    22 Newport St · 0.23 mi NE · Alteration or repair
    May 28$14,000
37. Exterior board up due to a building fire

    18 Treadway Rd · 0.21 mi S · Alteration or repair
    May 26$15,000
38. Wiring and installation hardwire smoke and CO detectors

    36 Spring Garden St · 0.24 mi E · Fire systems
    May 19$1,500
39. Repair rear stairs, replace kitchen cabinets 7 foot set Walls and base cabinets

    49 Willis St · 0.22 mi NW · Alteration or repair
    May 14$25,000
40. Electrical wiring for a 3-family house: 4 cat6 wire and r6 wire for each apartment

    73 Romsey St · 0.24 mi E · Electrical
    May 11$1,000
41. Formal amendment designating Jason Kahan as the Engineer of Record for the Tier I drawings so that both Tier…

    73 Romsey St · 0.24 mi E · Fire systems
    May 5not listed
42. Renovation all plumbing

    791 Columbia Rd · 0.24 mi N · Plumbing
    May 4$36,000
43. Running gas pipe for 2 furnaces

    791 Columbia Rd · 0.24 mi N · Plumbing
    May 4$10,500

Hearings are public: you can comment or attend. Dates can move; check the city's page before you go.

Boston's decision codes, from its data dictionary: AppProv, "approved with conditions".

1. To raze the existing two-car garage and construct a new two-family dwelling on the lot

   42 Bakersfield St · 890 ft W · Requested · city: "Community Process" · case BOA1904613
   Filed Sep 25
2. To construct a 6 Story Hotel Commercial mixed use blg of 40,923 SqFt

   269 E Cottage St · 630 ft N · No decision posted · city: "Hearing Concluded" · case BOA1895407
   Hearing date Oct 6filed Aug 27
3. To change occupancy from Existing 3-family to 5 family by dividing 1 unit to create 5-family total - no…

   20 Mayfield St · 130 ft S · Requested · city: "Community Process" · case BOA1853058
   Filed May 22
4. Zoning appeal; the description is on the city's appeal tracker.

   34 Spring Garden St · 0.24 mi E · Approved · city: "Appeal Closed", decision "AppProv" · case BOA1794725
   Decided Sep 4hearing Jul 28
5. Zoning appeal: "Scope of work clarified 6.2.2026: To renovate 769 Columbia Road, Boston…"

   769 Columbia Rd · 0.22 mi N · Approved · city: "Appeal Closed", decision "AppProv" · case BOA1857327
   Decided Jul 17hearing Jul 14

• 29 Mayfield St newest permit Apr 3, 2026
• 34 Mayfield St newest permit Sep 23, 2025
• 36 Mayfield St newest permit Oct 29, 2024
• 37 Mayfield St newest permit Oct 23, 2025
• 70 Mayfield St newest permit Jul 24, 2025
• 74 Mayfield St newest permit Nov 13, 2024
• 75 Mayfield St newest permit Oct 23, 2024

Boston Inspectional Services Department updated its data Oct 14, 2026. We checked it Oct 15, 14:40 UTC. See the city's official records.

Zoning requests come from the Boston Zoning Board of Appeal tracker. We read it Oct 15, 12:17 UTC.

At this address: every permit the city holds. Nearby: permits from the last two years, from our copy of the city's data.

For agents and scripts: This page as Markdown · JSON · Nearby as JSON · Zoning as JSON · MCP tool permits_near, and zoning_requests_near for zoning