# Building permits in Montgomery County 20842

9 permits in the last 90 days. The newest, Oct 5: Interior work only, Change the cladding around the existing cinder block chimney from faux stone to brick, at 20500 Martinsburg Rd.

| Date | Address | Type | Work | Cost | Permit |
|---|---|---|---|---|---|
| Oct 5, 2026 | [20500 Martinsburg Rd](https://nearbypermits.com/montgomery-county-md/address/20500-martinsburg-rd/) | Alteration or repair | Interior work only, Change the cladding around the existing cinder block chimney from faux stone to brick | $1,500 | [1165218](https://nearbypermits.com/montgomery-county-md/permit/1165218/) |
| Sep 30, 2026 | [21810 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21810-big-woods-rd/) | Fence, wall or deck | Demo old deck and Rebuild in the exact same location and size,Repair Existing Deck | $10,000 | [1167236](https://nearbypermits.com/montgomery-county-md/permit/1167236/) |
| Sep 28, 2026 | [21230 Martinsburg Rd](https://nearbypermits.com/montgomery-county-md/address/21230-martinsburg-rd/) | New building | Modular office building approx 27'W x 64'L U&O 419151 | $500,000 | [1131939](https://nearbypermits.com/montgomery-county-md/permit/1131939/) |
| Sep 2, 2026 | [18600 Barnesville Rd](https://nearbypermits.com/montgomery-county-md/address/18600-barnesville-rd/) | Solar | Install a 55.44 kW roof mount solar system on top of an equestrian riding arena. The project will use 112 SEG 495 watt panels, 2 SE7600H-US inverters, 2 SE11400H-US inverters, and mounted on the Iron Ridge roof mount system. | $151,800 | [1154425](https://nearbypermits.com/montgomery-county-md/permit/1154425/) |
| Aug 24, 2026 | [19810 Peach Tree Rd](https://nearbypermits.com/montgomery-county-md/address/19810-peach-tree-rd/) | Alteration or repair | Interior work only, Renovation of an existing two-story house with six bedrooms and four bathrooms to be converted into four bedrooms and five bathrooms. Also adding a foyer at the first-floor main entry and renovating the mudroom and laundry area.176 ADD / 575 ALT | $150,000 | [1166794](https://nearbypermits.com/montgomery-county-md/permit/1166794/) |
| Aug 21, 2026 | [23001 W Harris Rd](https://nearbypermits.com/montgomery-county-md/address/23001-w-harris-rd/) | Fence, wall or deck | New Decks - Construct 3 decks w/ steps and ramp. | $25,000 | [1167329](https://nearbypermits.com/montgomery-county-md/permit/1167329/) |
| Aug 4, 2026 | [20930 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/20930-big-woods-rd/) | Addition | We are looking to add a 30'x45' single level addition to the side / rear of the existing home. Mixed work type: add 1375sf, alt 336sf | $100,000 | [1144037](https://nearbypermits.com/montgomery-county-md/permit/1144037/) |
| Jul 31, 2026 | [20401 Peach Tree Rd](https://nearbypermits.com/montgomery-county-md/address/20401-peach-tree-rd/) | Fence, wall or deck | Replace existing deck adding new 5' x 11' area., deck- 605 | $40,468 | [1162526](https://nearbypermits.com/montgomery-county-md/permit/1162526/) |
| Jul 16, 2026 | [125 Greentree Farm Dr](https://nearbypermits.com/montgomery-county-md/address/125-greentree-farm-dr/) | Alteration or repair | The building permit scope includes adding a bulkhead to create a tray ceiling. Revision 01 (08/08/2026); extended work area (revision 01: alter 800 square feet [pt]); approved: 08/24/2026. | $211,278 | [1161929](https://nearbypermits.com/montgomery-county-md/permit/1161929/) |
| Jul 2, 2026 | [21363 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21363-big-woods-rd/) | New building | Revision 1 - Plans were updated to accurately reflect framing & roof truss design for the dormer windows in BR2.,Customer Wants To Use ePlansCustomer Wants To Use ePlans,Site-specific Longfellow model on lot 13. | $350,000 | [1153854](https://nearbypermits.com/montgomery-county-md/permit/1153854/) |
| Jun 29, 2026 | [16700 Thurston Rd](https://nearbypermits.com/montgomery-county-md/address/16700-thurston-rd/) | New building | New Construction of a Farm Labor Housing Unit | $500,000 | [1152953](https://nearbypermits.com/montgomery-county-md/permit/1152953/) |
| Jun 18, 2026 | [24009 Whites Ferry Rd](https://nearbypermits.com/montgomery-county-md/address/24009-whites-ferry-rd/) | New building | Construct new detached single family home with pool house | $1,151,900 | [1136854](https://nearbypermits.com/montgomery-county-md/permit/1136854/) |
| Jun 15, 2026 | [25110 Old Hundred Rd](https://nearbypermits.com/montgomery-county-md/address/25110-old-hundred-rd/) | Addition | House area addition & remodeling of interior. New layout -first floor: living room, dining room/ kitchen, bathroom, bedrrom with closet, office & stairs. -Second floor: two bedrooms w/ closets, bathroom, balcony, one master bedroom w/ master bathroom & walk-in closet, family room & flat terrace.,spe | $310,000 | [1070692](https://nearbypermits.com/montgomery-county-md/permit/1070692/) |
| May 20, 2026 | [21810 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21810-big-woods-rd/) | Solar | Install (22) roof-mounted solar panels on sfd/ system size 9.13 kw | $22,000 | [1156506](https://nearbypermits.com/montgomery-county-md/permit/1156506/) |
| May 15, 2026 | [20431 Peach Tree Rd](https://nearbypermits.com/montgomery-county-md/address/20431-peach-tree-rd/) | Fence, wall or deck | I would like to permit both a 192 ft2 shed (12' x16' ) and a 189 ft2 greenhouse (9' x21' ). Both are less than 200 ft2,New Shed | $15,000 | [1149647](https://nearbypermits.com/montgomery-county-md/permit/1149647/) |
| May 5, 2026 | [21339 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21339-big-woods-rd/) | New building | Site-specific RODIN model on lot 16.Mixed work type permit: NEW CONSTRUCTION 8899 square feet DECK 230 square feet [PT]. | $350,000 | [1146743](https://nearbypermits.com/montgomery-county-md/permit/1146743/) |
| Apr 21, 2026 | [21351 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21351-big-woods-rd/) | Fence, wall or deck | 602 SQ. FT Deck with 5 steps,new deck | $38,100 | [1152194](https://nearbypermits.com/montgomery-county-md/permit/1152194/) |
| Mar 10, 2026 | [22014 Dickerson Rd](https://nearbypermits.com/montgomery-county-md/address/22014-dickerson-rd/) | Addition | Replacing existing addition constructed improperly by previous builder | $106,000 | [1140964](https://nearbypermits.com/montgomery-county-md/permit/1140964/) |
| Feb 24, 2026 | [20788 Peach Tree Rd](https://nearbypermits.com/montgomery-county-md/address/20788-peach-tree-rd/) | Pool or spa | Install inground vinyl pool. *HISTORIC AREA WORK PERMIT NEEDED*The pool and all pool decking must maintain a 10 ft setback to the edge of the septic tank. Any pool decking added thatdoes not meet this requirement must be removed before any further building permits are issued for this property. | $134,000 | [1145034](https://nearbypermits.com/montgomery-county-md/permit/1145034/) |
| Feb 16, 2026 | [21400 Beallsville Rd](https://nearbypermits.com/montgomery-county-md/address/21400-beallsville-rd/) | Solar | Install (52) roof mounted solar panels, 22.36 kw | $52,000 | [1149002](https://nearbypermits.com/montgomery-county-md/permit/1149002/) |
| Feb 10, 2026 | [21343 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21343-big-woods-rd/) | Fence, wall or deck | Construct a detached 2-car garage with storage space above. The height of the second floor must be 7 ft or below. The garage (first or second floor) is NOT approved for any habitable space. It is not approved to be finished space that is heated and cooled. It is not approved for any plumbing. | $75,000 | [1144926](https://nearbypermits.com/montgomery-county-md/permit/1144926/) |
| Feb 2, 2026 | [18500 Elmer School Rd](https://nearbypermits.com/montgomery-county-md/address/18500-elmer-school-rd/) | Other | Equipment cabinet must be the same color or pattern as the existing structure, unless it is a stealth design approved by the Department of Transportation.Customer Wants To Use ePlans,On existing tower,AT&T plans to remove 6 antennas and 9 radios. Install 6 antennas and 9 radios. There will be no str | $36,000 | [1132568](https://nearbypermits.com/montgomery-county-md/permit/1132568/) |
| Jan 21, 2026 | [21401 Big Woods Rd](https://nearbypermits.com/montgomery-county-md/address/21401-big-woods-rd/) | New building | Revision 1 - Revise permit to include 20' sliding door option instead of windows in great room.,Customer Wants To Use ePlansCustomer Wants To Use ePlans,Site-specific plans for house on lot 8, Knob Hill. | $350,000 | [1130879](https://nearbypermits.com/montgomery-county-md/permit/1130879/) |
| Dec 1, 2025 | [22175 Dickerson School Rd](https://nearbypermits.com/montgomery-county-md/address/22175-dickerson-school-rd/) | Fence, wall or deck | Revision 01 Approved - This revision is to add a second 200 sf shed next to the 200 sf shed that was just approved. A concrete slab will be poured for the installation of a metal shed that will house lawncare equipment for maintaining our 3.75 acres.,New Shed. Approval is only for the proposed shed  | $13,000 | [1127967](https://nearbypermits.com/montgomery-county-md/permit/1127967/) |
| Nov 19, 2025 | [22210 Dickerson Rd](https://nearbypermits.com/montgomery-county-md/address/22210-dickerson-rd/) | Other | On existing tower, remove 6 antennas and 9 radios. Install 6 antennas and 9 radios. On ground in existing shelter, remove 6 duplexers. Remove 1 power plant. Install 1 power plant. There will be no structure height increase and no ground disturbance. | $36,000 | [1128135](https://nearbypermits.com/montgomery-county-md/permit/1128135/) |

More: https://nearbypermits.com/montgomery-county-md/zip/20842/?page=2

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Source: Montgomery County Department of Permitting Services permit data (https://data.montgomerycountymd.gov/d/m88u-pqki). Checked 2026-10-07 23:06 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Map and full list of the 9 permits in Montgomery County 20842 from the last 90 days: https://nearbypermits.com/montgomery-county-md/zip/20842/