Detached Garage Cost in Boston, MA
Detached Garage in Boston costs $46–$108 per sq ft in 2026. A typical 576 sq ft project averages $40,090. Boston pricing runs roughly 20% above the Northeast regional baseline.
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How much does a detached garage cost in Boston, MA? In Boston, a detached garage costs $26,266–$62,208 in 2026, with most homeowners paying around $40,090 for a typical 576 sq ft project.
- Per sq ft
- $46–$108
- Typical range
- $26,266–$62,208
- Average
- $40,090
- Labor share
- 50%
Boston, MA Average Cost (2026)
What Drives Detached Garage Costs in Boston
Permits & zoning
Boston detached garage permits run through the Inspectional Services Department on a valuation basis — roughly $50 plus $10 per $1,000 of construction cost, or about $450–$850 for a typical two-car garage before trade permits. Setbacks commonly run 5–10 feet side/rear and 15–25 feet at the front, though Boston's dense older lots often make a full-size detached garage difficult to fit without a variance. Properties in historic districts (Beacon Hill, South End, Back Bay, Charlestown) need Boston Landmarks Commission review for exterior design.
Climate & construction
Boston's 48-inch frost depth requires footings well below grade — a significant foundation cost versus milder markets. Older Boston lots are frequently too narrow or shallow for a standard detached garage, making single-car or shared-driveway designs more common than in suburban markets. Snow load and ice-dam protection on the garage roof follow the same standards as the main house.
Local market
A single-car or compact two-car garage is more typical than a full 24×24 build given Boston's constrained lot sizes. Costs run 15–25% above the Northeast baseline, reflecting the city's high labor rates and historic-district design requirements where applicable.
Information reflects general guidance for Boston, MA; permit fees, code requirements, and zoning rules change — always confirm with the local building department before starting work.
Cost Breakdown
Based on a 576 sq ft project in Boston, MA. Actual costs vary by contractor, site conditions, and material choices.
Detached Garage Cost by Size in Boston
Boston pricing for common detached garage project sizes (2026).
| Project size | Low | Mid | High |
|---|---|---|---|
| 288 sq ft | $13,133 | $20,045 | $31,104 |
| 576 sq ft | $26,266 | $40,090 | $62,208 |
| 1,152 sq ft | $52,531 | $80,179 | $124,416 |
Based on $46–$108 per sq ft in Boston, MA. A 1-car garage is ~240 sq ft. A 2-car garage is ~576 sq ft.
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Return on Investment
How much value does a detached garage add to your home at resale?
How Detached Garage compares to other projects
ROI figures based on Remodeling Magazine Cost vs. Value Report 2024, national averages. Actual resale value depends on your market, home price tier, and project quality.
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Frequently Asked Questions
How much does a detached garage cost in Boston, MA?
In Boston, MA, a typical 576 sq ft detached garage project costs between $26,266 and $62,208, averaging $40,090. Boston pricing runs roughly 20% above the Northeast regional baseline.
How much does a 2-car garage cost in Boston?
BuildCost's 576 sq ft default size is a 2-car garage — it typically costs $26,266–$62,208 in Boston, MA, averaging $40,090.
Do I need a permit for a detached garage in Boston?
Boston detached garage permits run through the Inspectional Services Department on a valuation basis — roughly $50 plus $10 per $1,000 of construction cost, or about $450–$850 for a typical two-car garage before trade permits. Setbacks commonly run 5–10 feet side/rear and 15–25 feet at the front, though Boston's dense older lots often make a full-size detached garage difficult to fit without a variance. Properties in historic districts (Beacon Hill, South End, Back Bay, Charlestown) need Boston Landmarks Commission review for exterior design.
What detached garage size is typical in Boston?
A single-car or compact two-car garage is more typical than a full 24×24 build given Boston's constrained lot sizes. Costs run 15–25% above the Northeast baseline, reflecting the city's high labor rates and historic-district design requirements where applicable.
Does a detached garage add value to homes in Boston?
Nationally, a detached garage recoups about 65% of its cost at resale. For a $40,090 project in Boston, MA, that's approximately $26,059 in added home value. Resale recovery varies by neighborhood and current market conditions.
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Other Project Costs in Boston
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How big is your Detached Garage?
A 1-car garage is ~240 sq ft. A 2-car garage is ~576 sq ft.
Pro Tips
- Get at least 3 local contractor quotes
- Confirm permit requirements with the city
- Budget 10–20% contingency
- Check contractor license and insurance