Permit record · Maryland
What Montgomery County paid for a home addition
Not an estimate. We read 851 permits filed with Montgomery County and took the value written on each one.
Half of these jobs landed between $45,000 and $246,100. One in ten came in under $23,000; one in ten ran past $400,000.
The same job, other cities
| City | Median | Typical range | Permits |
|---|---|---|---|
| Montgomery County, MD | $113,965 | $45,000 – $246,100 | 851 |
| Marin County, CA | $200,000 | $50,000 – $400,000 | 93 |
| Chicago, IL | $150,000 | $80,000 – $295,000 | 1,175 |
| Seattle, WA | $150,000 | $61,750 – $250,912 | 1,212 |
| Austin, TX | $132,500 | $46,500 – $300,000 | 66 |
| Baton Rouge, LA | $100,000 | $48,667 – $250,000 | 173 |
| Raleigh, NC | $86,182 | $38,303 – $168,659 | 407 |
| San Francisco, CA | $85,000 | $25,100 – $241,438 | 687 |
| New York, NY | $80,840 | $32,000 – $252,000 | 3,399 |
| Sacramento, CA | $77,000 | $30,000 – $200,000 | 129 |
| Los Angeles, CA | $75,000 | $40,000 – $140,000 | 7,767 |
| Corona, CA | $59,147 | $35,000 – $80,000 | 40 |
| New Orleans, LA | $58,675 | $21,786 – $165,214 | 820 |
| Kansas City, MO | $50,164 | $25,000 – $120,121 | 171 |
| Detroit, MI | $49,250 | $22,000 – $100,000 | 162 |
| Everett, WA | $40,000 | $20,000 – $140,907 | 106 |
| Anaheim, CA | $19,903 | $14,464 – $27,830 | 140 |
Across the cities we cover, the same job runs from $19,903 in Anaheim to $200,000 in Marin County — a 10.0× spread. See all cities →
Other projects in Montgomery County
| Project | Median | Permits |
|---|---|---|
| Solar Panels | $24,000 | 3,334 |
| Deck or Patio | $15,708 | 2,168 |
| Kitchen Remodel | $64,000 | 964 |
| Bathroom Remodel | $27,000 | 650 |
| Swimming Pool | $100,000 | 233 |
| Roof Replacement | $29,838 | 226 |
| Garage | $33,500 | 220 |
| Interior Remodel | $84,000 | 89 |
| ADU / Guest House | $65,000 | 61 |
Source
Source: Montgomery County MD — Commercial and Residential Building Permits. Permits issued in the last 24 months, classified by the work described on the permit. The figure is the declared value of the work — what the applicant reported to the city. It excludes work done without a permit and can sit below a final invoice. Read the full methodology. Data refreshed 2026-09-04.