Nearby Permits
Map of 100 permits within a quarter mile of 21 Mason StElectrical, 11 Whitman St, Oct 6, 2026Alteration or repair, 905 Broadway, Oct 6, 2026Plumbing, 915 Broadway, Oct 5, 2026Mechanical (HVAC), 35 Electric Ave, Oct 1, 2026Plumbing, 37 Mason St, Oct 1, 2026Plumbing, 37 Mason St, Oct 1, 2026Plumbing, 37 Mason St, Oct 1, 2026Electrical, 128 Powder House Blvd, Oct 1, 2026Roofing, 88 Ossipee Rd, Oct 1, 2026Electrical, 905 Broadway, Sep 29, 2026Electrical, 7 Corinthian Rd, Sep 29, 2026Alteration or repair, 22 Burnham St, Sep 28, 2026Electrical, 21 Simpson Ave, Sep 16, 2026Addition, 7 Corinthian Rd, Sep 16, 2026Electrical, 58 Irving St, Sep 14, 2026Plumbing, 58 Irving St, Sep 10, 2026Plumbing, 58 Irving St, Sep 10, 2026Electrical, 9 Summit St, Sep 9, 2026Mechanical (HVAC), 102 Wallace St, Sep 9, 2026Alteration or repair, 19 Electric Ave, Sep 8, 2026Fence, wall or deck, 20 Lower Campus Rd, Sep 3, 2026Electrical, 62 Talbot Ave, Sep 2, 2026Demolition, 1 Walker St, Sep 1, 2026Alteration or repair, 52 Powder House Blvd, Aug 31, 2026Mechanical (HVAC), 35 Irving St, Aug 28, 2026Mechanical (HVAC), 62 Talbot Ave, Aug 27, 2026Addition, 7 Corinthian Rd, Aug 27, 2026Electrical, 62 Talbot Ave, Aug 26, 2026Alteration or repair, 18 Paulina St, Aug 25, 2026Alteration or repair, 21 Simpson Ave, Aug 24, 2026Plumbing, 128 Powder House Blvd, Aug 18, 2026Plumbing, 128 Powder House Blvd, Aug 18, 2026Electrical, 102 Wallace St, Aug 17, 2026Alteration or repair, 85 Chandler St, Aug 17, 2026Alteration or repair, 898 Broadway, Aug 17, 2026Alteration or repair, 43 Irving St, Aug 11, 2026Electrical, 34 Irving St, Aug 10, 2026Electrical, 85 Chandler St, Aug 7, 2026Electrical, 23 Irving St, Aug 6, 2026Electrical, 26 Leonard St, Aug 5, 2026Electrical, 62 Talbot Ave, Aug 3, 2026Alteration or repair, 34 Irving St, Aug 3, 2026Plumbing, 25 Latin Way, Jul 31, 2026Plumbing, 18 Paulina St, Jul 30, 2026Plumbing, 42 Whitman St, Jul 30, 2026Alteration or repair, 128 Powder House Blvd, Jul 30, 2026Plumbing, 23 Irving St, Jul 28, 2026Electrical, 25 Latin Way, Jul 28, 2026Electrical, 237 Holland St, Jul 28, 2026Electrical, 20 Lower Campus Rd, Jul 27, 2026Alteration or repair, 44 Walker St, Jul 27, 2026Plumbing, 42 Whitman St, Jul 24, 2026Electrical, 128 Powder House Blvd, Jul 22, 2026Electrical, 25 Latin Way, Jul 21, 2026Plumbing, 62 Talbot Ave, Jul 20, 2026Alteration or repair, 62 Talbot Ave, Jul 20, 2026Electrical, 1 Walker St, Jul 16, 2026Electrical, 1 Walker St, Jul 16, 2026Electrical, 23 Irving St, Jul 14, 2026Mechanical (HVAC), 9 Summit St, Jul 13, 2026Electrical, 26 Chandler St, Jul 13, 2026Electrical, 49 Electric Ave, Jul 13, 2026Alteration or repair, 45 Mason St, Jul 13, 2026Alteration or repair, 49 Electric Ave, Jul 10, 2026Electrical, 898 Broadway, Jul 9, 2026Roofing, 80 Electric Ave, Jul 9, 2026Roofing, 16 Powder House Blvd, Jul 8, 2026Mechanical (HVAC), 53 Chandler St, Jul 7, 2026Electrical, 20 Lower Campus Rd, Jul 7, 2026Plumbing, 53 Chandler St, Jul 2, 2026Plumbing, 34 Whitman St, Jul 1, 2026Electrical, 62 Talbot Ave, Jun 30, 2026Alteration or repair, 67 Simpson Ave, Jun 30, 2026Alteration or repair, 23 Irving St, Jun 30, 2026Electrical, 34 Whitman St, Jun 29, 2026Electrical, 74 Simpson Ave, Jun 24, 2026Alteration or repair, 85 Chandler St, Jun 24, 2026Plumbing, 55 Ossipee Rd, Jun 23, 2026Alteration or repair, 34 Whitman St, Jun 22, 2026Alteration or repair, 929 Broadway, Jun 18, 2026Alteration or repair, 50 Simpson Ave, Jun 15, 2026Alteration or repair, 14 Irving St, Jun 11, 2026Mechanical (HVAC), 38 Ossipee Rd, Jun 8, 2026Plumbing, 42 Whitman St, Jun 4, 2026Electrical, 42 Whitman St, Jun 3, 2026Alteration or repair, 62 Talbot Ave, Jun 3, 2026Electrical, 15 Leonard St, Jun 2, 2026Alteration or repair, 82 Wallace St, Jun 2, 2026Electrical, 45 Mason St, May 29, 2026Electrical, 23 Mason St, May 27, 2026Alteration or repair, 82 Wallace St, May 26, 2026Electrical, 68 Electric Ave, May 14, 2026Roofing, 4 Ossipee Rd, May 14, 2026Alteration or repair, 100 Wallace St, May 13, 2026Alteration or repair, 937 Broadway, May 12, 2026Electrical, 12 Teele Ave, May 11, 2026Plumbing, 1 Walker St, May 7, 2026Roofing, 12 Teele Ave, May 7, 2026Alteration or repair, 42 Whitman St, May 6, 2026New building, 872 Broadway, Aug 27, 2026660 ft Map preview
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21 Mason St

Somerville, MA 02144

The biggest project within a quarter mile since May 1: a $649,322 alteration or repair at 62 Talbot Ave, permitted Jul 20.

One permit on record here. The newest, Dec 4, 2025: Remove and rebuild first floor deck. Within a quarter mile, the city has issued 100 more permits (98 projects) since May 1. One is for a new building, 0.23 mi away.

MayJunJulAugSepOct
Within
Since
Here1 permit · 21 Mason St
  1. Remove and rebuild first floor deck
    Alteration or repair
    Dec 4, 2025$18,800
Sort
Next doorunder 250 ft · 6 permits in 5 projects
  1. Installing Mitsubishi 36K BTU Outdoor Unit
    11 Whitman St · 210 ft W · Electrical
    Oct 6$4,500
  2. "Replacement of steam boiler in basement Purepro AGS5-HN " × 2 permits
    37 Mason St · 180 ft NE · Plumbing
    Oct 1not listed
  3. Repair gas leaks
    37 Mason St · 180 ft NE · Plumbing
    Oct 1not listed
  4. Emergency reapair of deck columns and rails
    22 Burnham St · 120 ft E · Alteration or repair
    Sep 28$8,650
  5. Run circuit for outside porch outlet.install ceiling outside sense light
    23 Mason St · under 10 ft · Electrical
    May 27$900
This block250 to 1,000 ft · 55 permits in 54 projects
  1. Remove one (1) existing layer of siding
    905 Broadway · 820 ft SE · Alteration or repair
    Oct 6$78,799
  2. Tub to shower conversion in 1st floor bathroom
    915 Broadway · 740 ft SE · Plumbing
    Oct 5not listed
  3. Ductwork for dual fuel furnace and heatpump
    35 Electric Ave · 480 ft NW · Mechanical (HVAC)
    Oct 1$24,500
  4. Upgrade Service from 200 amps to 400 amps
    128 Powder House Blvd · 980 ft NW · Electrical
    Oct 1$8,900
  5. Temporarily remove 1 EV charger
    905 Broadway · 820 ft SE · Electrical
    Sep 29$1,100
  6. Upgrade existing electrical service from 100 amps to 200 amps
    7 Corinthian Rd · 490 ft SW · Electrical
    Sep 29$24,000
  7. Building foundation (sonotube) -BUILDING/ADDITION PERMIT B26-001007
    7 Corinthian Rd · 490 ft SW · Addition
    Sep 16$15,000
  8. Wiring replacement for a gas boiler
    58 Irving St · 740 ft S · Electrical
    Sep 14$500
  9. Replacement of Existing Cross Connection Device
    58 Irving St · 740 ft S · Plumbing
    Sep 10not listed
  10. Replacement of Existing Boiler
    58 Irving St · 740 ft S · Plumbing
    Sep 10not listed
  11. Apt 1 HVAC SYSTEM 1: (1) CCOXHBMZ427HP heat pump condenser
    102 Wallace St · 500 ft SE · Mechanical (HVAC)
    Sep 9$40,000
  12. Remove/replace 1 existing exterior door
    19 Electric Ave · 310 ft NW · Alteration or repair
    Sep 8$3,422
  13. ELLIS OVAL TUFTS UNIVERSITY: Provide rental of one pre-fabricated ADA Ramp and landing to accommodate…
    20 Lower Campus Rd · 760 ft NE · Fence, wall or deck
    Sep 3$10,672
  14. Installation of (22) Double Hung Window Inserts in existing openings
    52 Powder House Blvd · 490 ft E · Alteration or repair
    Aug 31$53,366
  15. First-floor addition, second-floor interior renovation
    7 Corinthian Rd · 490 ft SW · Addition
    Aug 27$522,404
  16. Fixtures replacement of kitchen sink and dishwasher of same spot and two tankless water heater
    128 Powder House Blvd · 980 ft NW · Plumbing
    Aug 18not listed
  17. 2. new gas line for water heater tankless and gas stove replacement for 2nd floor
    128 Powder House Blvd · 980 ft NW · Plumbing
    Aug 18not listed
  18. 320 amp service upgrade, wire for 3 mini split condensers
    102 Wallace St · 500 ft SE · Electrical
    Aug 17$15,000
  19. Rebuild existing 3 seasons porch in existing footprint due to rot
    85 Chandler St · 790 ft SE · Alteration or repair
    Aug 17$27,300
  20. Interior renovation of existing attic: remove drywall
    898 Broadway · 980 ft SE · Alteration or repair
    Aug 17$33,250
  21. Replace main beams
    43 Irving St · 940 ft S · Alteration or repair
    Aug 11$64,845
  22. Rough and finish electrical on 3 season porch
    85 Chandler St · 790 ft SE · Electrical
    Aug 7$1,600
  23. Install EV charger
    26 Leonard St · 370 ft E · Electrical
    Aug 5$1,500
  24. Kitchen sink disposal and dishwasher
    42 Whitman St · 560 ft W · Plumbing
    Jul 30not listed
  25. Replace existing kitchen cabinets and counter
    128 Powder House Blvd · 980 ft NW · Alteration or repair
    Jul 30$42,000
  26. Installation of (1) 8' x 8' x 6" precast concrete pad
    20 Lower Campus Rd · 760 ft NE · Electrical
    Jul 27$5,000
  27. Interior repairs due to water damage
    44 Walker St · 670 ft SE · Alteration or repair
    Jul 27$9,908
  28. Sub meters
    42 Whitman St · 560 ft W · Plumbing
    Jul 24not listed
  29. Install new branch circuits for the kitchen and laundry
    128 Powder House Blvd · 980 ft NW · Electrical
    Jul 22$4,500
  30. Replace fire-damaged wiring, make safe all affected circuits
    49 Electric Ave · 640 ft NW · Electrical
    Jul 13$3,000
  31. Weatherization, Air Sealing, and Insulation
    45 Mason St · 260 ft NE · Alteration or repair
    Jul 13$17,977
  32. Remove existing ceilings in bedrooms 1 & 2 of unit 1
    49 Electric Ave · 640 ft NW · Alteration or repair
    Jul 10$12,781
  33. Demo make safe exposed wiring in attic
    898 Broadway · 980 ft SE · Electrical
    Jul 9$2,900
  34. Install EV charging stations with precast concrete pads and bollards WORK @ 18 LOWER CAMPUS RD- COHEN LOT
    20 Lower Campus Rd · 760 ft NE · Electrical
    Jul 7$98,000
  35. Remodel first floor bath
    34 Whitman St · 480 ft W · Plumbing
    Jul 1not listed
  36. ONE Pipe boot replacement on section of roof above bathroom
    67 Simpson Ave · 480 ft S · Alteration or repair
    Jun 30$4,999
  37. Bathroom renovation
    34 Whitman St · 480 ft W · Electrical
    Jun 29$500
  38. Wire and install power for hvac air handler and AC compressor
    74 Simpson Ave · 410 ft SW · Electrical
    Jun 24$800
  39. Remove 8- existing windows and 1 door from front 3-seasons porch
    85 Chandler St · 790 ft SE · Alteration or repair
    Jun 24$25,260
  40. Replace broken 4" drain pipe
    55 Ossipee Rd · 940 ft NW · Plumbing
    Jun 23not listed
  41. Remove tub add shower and tile as necessary
    34 Whitman St · 480 ft W · Alteration or repair
    Jun 22$10,500
  42. Replace one railing on porch
    929 Broadway · 620 ft SE · Alteration or repair
    Jun 18$2,130
  43. Insulating exterior walls using cellulose R15
    50 Simpson Ave · 690 ft SW · Alteration or repair
    Jun 15$8,099
  44. New air conditioning and heating dual fuel with heat pump system and ERV installation
    38 Ossipee Rd · 630 ft NW · Mechanical (HVAC)
    Jun 8$43,770
  45. Kitchen remodel
    42 Whitman St · 560 ft W · Plumbing
    Jun 4not listed
  46. Kitchen Remodel
    42 Whitman St · 560 ft W · Electrical
    Jun 3$10,000
  47. Upgrade existing 200A 2-gang meter socket with disconnects to 400A 2-gang meter socket with disconnects
    15 Leonard St · 480 ft SE · Electrical
    Jun 2$16,659
  48. Residential weatherization/air sealing × 2 permits
    82 Wallace St · 660 ft S · Alteration or repair
    May 26 to Jun 2$3,624
  49. Knob and Tube Remediation (Partial House)
    45 Mason St · 260 ft NE · Electrical
    May 29$24,802
  50. Install Ductless Mini Split - First Floor Apartment
    68 Electric Ave · 890 ft NW · Electrical
    May 14$2,500
  51. Strip re-roof
    4 Ossipee Rd · 260 ft N · Roofing
    May 14$20,000
  52. Replacing 28' of sill plate, constructing 20' of skirt wall
    100 Wallace St · 520 ft S · Alteration or repair
    May 13$37,674
  53. Replace (8) existing storm windows with new Pella 250 double-hung windows (42" x 54") black
    937 Broadway · 530 ft SE · Alteration or repair
    May 12$10,000
  54. Update kitchen same layout replacing cabinets
    42 Whitman St · 560 ft W · Alteration or repair
    May 6$30,800
Within a quarter mile1,000 ft to ¼ mi · 39 permits · 1 new building, $20,000
  1. Remove all roofing materials and install premium Owens Corning roofing materials
    88 Ossipee Rd · 0.25 mi NW · Roofing
    Oct 1$21,807
  2. Wire lighting and receptacles for rear porch
    21 Simpson Ave · 0.19 mi SW · Electrical
    Sep 16$500
  3. Hard wired interconnected smokes
    9 Summit St · 0.21 mi SE · Electrical
    Sep 9$1,600
  4. Provide low voltage interlock wiring for HVAC upgrades
    62 Talbot Ave · 0.20 mi N · Electrical
    Sep 2$5,000
  5. Demolish existing outdoor covered garage PERMIT TO REBUILD B26-000383 DEMO ON OR AFTER SEPTEMBER 9
    1 Walker St · 0.22 mi E · Demolition
    Sep 1$10,000
  6. 1-furnace, 1-coil, 1-air handler
    35 Irving St · 0.20 mi S · Mechanical (HVAC)
    Aug 28$53,549
  7. Renovation of the Joshi Lab at Tufts University
    62 Talbot Ave · 0.20 mi N · Mechanical (HVAC)
    Aug 27$50,000
  8. Buildout of Physical Therapy Office
    872 Broadway · 0.23 mi SE · New building
    Aug 27$20,000
  9. Install 45 total cables, 20 locations
    62 Talbot Ave · 0.20 mi N · Electrical
    Aug 26$15,014
  10. Residential weatherization/air sealing
    18 Paulina St · 0.20 mi SW · Alteration or repair
    Aug 25$2,000
  11. Repair rear decks
    21 Simpson Ave · 0.19 mi SW · Alteration or repair
    Aug 24$22,000
  12. Installation and wiring of replacement mixed system into existing ductwork
    34 Irving St · 0.19 mi SW · Electrical
    Aug 10$11,531
  13. Install new 100 amp sub panel associated with e26-001004
    23 Irving St · 0.22 mi S · Electrical
    Aug 6$1,500
  14. Electrical remodel
    62 Talbot Ave · 0.20 mi N · Electrical
    Aug 3$25,000
  15. Installation and wiring of replacement system into existing ductwork consisting of two condensers and two air…
    34 Irving St · 0.19 mi SW · Alteration or repair
    Aug 3$46,124
  16. Install Ansul valves and replace CO solenoid valves at kitchen equipment stations
    25 Latin Way · 0.21 mi N · Plumbing
    Jul 31not listed
  17. Apt 1 - 2nd Floor Bathroom - Replace bathtub, no structural change
    18 Paulina St · 0.20 mi SW · Plumbing
    Jul 30not listed
  18. 1/2 bathroom second floor, full bathroom third floor & adding laundry connection third floor
    23 Irving St · 0.22 mi S · Plumbing
    Jul 28not listed
  19. Add fire alarm monitor modules to Ansul and CO systems that are being installed by others
    25 Latin Way · 0.21 mi N · Electrical
    Jul 28$9,500
  20. Water damage
    237 Holland St · 0.25 mi W · Electrical
    Jul 28$500
  21. Furnish and install wiring for multiple Honeywell E3
    25 Latin Way · 0.21 mi N · Electrical
    Jul 21$12,000
  22. Addition of two sinks, two eyewash, dishwaher connection
    62 Talbot Ave · 0.20 mi N · Plumbing
    Jul 20not listed
  23. Renovation of existing Lab Space for research group
    62 Talbot Ave · 0.20 mi N · Alteration or repair
    Jul 20$649,322
  24. 400A Electrical Service upgrade in a Two Family House
    1 Walker St · 0.22 mi E · Electrical
    Jul 16$6,500
  25. Electrical work in the detached garage B26-000383
    1 Walker St · 0.22 mi E · Electrical
    Jul 16$3,500
  26. Re wire first floor bath
    23 Irving St · 0.22 mi S · Electrical
    Jul 14$4,000
  27. Installation of new air source heat pump installed in basement servicing the first floor through new ductwork
    9 Summit St · 0.21 mi SE · Mechanical (HVAC)
    Jul 13$25,133
  28. Install EV charger with intergrated load management
    26 Chandler St · 0.23 mi S · Electrical
    Jul 13$3,000
  29. Repoint existing masonry chimney from crown to flashing line
    80 Electric Ave · 0.20 mi NW · Roofing
    Jul 9$4,700
  30. Remove and dispose of the existing garage roofing system down to the concrete deck
    16 Powder House Blvd · 0.21 mi E · Roofing
    Jul 8$10,376
  31. Install ducted heat pump systems
    53 Chandler St · 0.19 mi S · Mechanical (HVAC)
    Jul 7$38,500
  32. Install plumbing for new home
    53 Chandler St · 0.19 mi S · Plumbing
    Jul 2not listed
  33. Demolition/make-safe, temporary lighting and power
    62 Talbot Ave · 0.20 mi N · Electrical
    Jun 30$95,000
  34. Renovate two bathrooms & laundry area 1st Floor: Gut & renovate the Half Bath
    23 Irving St · 0.22 mi S · Alteration or repair
    Jun 30$80,450
  35. Residential weatherization/air sealing
    14 Irving St · 0.24 mi SW · Alteration or repair
    Jun 11$2,000
  36. Alteration of Classroom Space - Update floors
    62 Talbot Ave · 0.20 mi N · Alteration or repair
    Jun 3$259,270
  37. Rewire front entry switches and 2 lights
    12 Teele Ave · 0.22 mi NW · Electrical
    May 11$1,100
  38. Bath bar sink
    1 Walker St · 0.22 mi E · Plumbing
    May 7not listed
  39. Create new entry door to 10 Teele Ave
    12 Teele Ave · 0.22 mi NW · Roofing
    May 7$66,340
More on this streetMason St · 7 other addresses with permits

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Somerville Inspectional Services Division updated its data Oct 7, 2026. We checked it Oct 8, 05:22 UTC. See the city's official records (SomerStat, City of Somerville, ODbL 1.0).

Contains information from Applications for Permits and Licenses (SomerStat, City of Somerville), which is made available here under the Open Database License (ODbL).

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

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