How much does a garage addition cost in Boston, MA?

The average garage addition in Boston, MA costs $88,743 in 2026. Costs range from $40,338 for a basic project to $209,755 for a high-end renovation. Boston is 61% more expensive than the national average of $55,000.

What is the labor rate for contractors in Boston?

The average contractor labor rate in Boston, MA is $53.91/hour, compared to the national average of $30/hour. For a garage addition, labor typically accounts for 50% of the total cost, which is approximately $44,372 in Boston.

Are materials more expensive in Boston?

Boston has a material cost index of 143 (national average = 100). Materials cost about 43% more than the national average. For a garage addition, materials account for 50% of the cost, approximately $44,372.

Do I need a permit for a garage addition in Boston?

Yes, a garage addition typically requires building permits in Boston, MA. The average permit cost in Boston is $3,166. Always confirm requirements with the Boston building department before starting work.

Is a garage addition a good investment in Boston?

A garage addition provides an estimated 65% ROI nationally. In Boston, where the median home price is $512,971, this project costs about 17.3% of your home value. This is a significant investment relative to home value — consider carefully whether the local market supports premium renovations.

Garage Addition in Boston, MA — Costs $40,338 to $209,755

What does garage addition cost in Boston? Average $88,743, ranging $40,338–$209,755. Labor runs $53.91/hr locally — 61% above the national average. Free breakdown with material + labor split.

Boston, MA Market

+61% vs national

Labor Rate

$53.91/hr

Material Index

143

Avg Permit Cost

$3,166

Median Home Price

$512,971

As one of the largest metros in Massachusetts, Boston has a competitive contractor market with hundreds of licensed professionals. This typically gives homeowners more leverage on pricing, though high demand for renovations can offset that advantage. At 61% above the national average, Boston is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. With a median home price of $512,971, this garage addition represents just 17.3% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.

Low Estimate

$40,338

National: $25,000

Mid-Range

$88,743

National: $55,000

High End

$209,755

National: $130,000

Per Sq Ft

$121

National: $75

Duration: 4-8 weeks

DIY: Hard

Permits: Required

ROI: 65%

Garage Addition Cost Calculator for Boston

Adjusted for Boston's labor rate ($53.91/hr) and material costs (index 143).

Project Size: 200 sq ft

50 sq ft1,000 sq ft

Quality Level

Mid-grade materials, good quality fixtures, standard options.

Estimated Total in Boston

$88,743

Based on 200 sq ft at mid quality, adjusted for Boston market rates.

Local Cost Breakdown

Labor (50%)$44,372

At Boston's average rate of $53.91/hr (80% above national avg)

Materials (50%)$44,372

Material cost index 143 (43% above national baseline of 100)

Garage Addition vs. Home Value in Boston

Metric	Boston	National Avg
Garage Addition (Mid-Range)	$88,743	$55,000
Median Home Price	$512,971	$350,000
Project as % of Home Value	17.3%	15.7%
Estimated ROI	65%	65%
Median Household Income	$92,000	$75,000

What Affects the Price in Boston

1Local labor rates ($53.91/hr in Boston)
2Material cost index (143 vs national 100)
3Number of bays
4Attached vs detached
5Finished interior
6Loft storage

Popular Upgrades

Finished interior
Loft storage
EV charger circuit

Other Projects in Boston, MA

Second Story Addition

$322,700

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$242,025

HardROI 80%

Room Addition

$145,215

HardROI 55%

Swimming Pool Installation

$102,492

HardROI 40%

Home Addition

$127,612

MediumROI 60%

Inground Swimming Pool

$101,299

HardROI 43%

Attic Conversion

$89,752

HardROI 64%

Swimming Pool Construction

$81,593

Professional OnlyROI 43%

Garage Addition in Other Massachusetts Cities

Worcester, MA

$77,862

-12%Pop. 206,518

Springfield, MA

$74,177

-16%Pop. 155,929

Cambridge, MA

$89,384

+1%Pop. 118,403

Lowell, MA

$75,194

-15%Pop. 115,554

Brockton, MA

$73,847

-17%Pop. 105,643

Quincy, MA

$82,839

-7%Pop. 101,636

New Bedford, MA

$77,678

-12%Pop. 101,079

Lynn, MA

$73,306

-17%Pop. 99,989

Planning a Garage Addition in Boston

Building permits are typically required for a garage addition in Boston. The average permit fee in this area is $3,166, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 4-8 weeks from start to finish.

A garage addition is a complex project best left to licensed professionals. In Boston, skilled contractors charge an average of $53.91/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.

With a median household income of $92,000, many Boston residents can budget for this project through savings. The mid-range cost of $88,743 represents 96% of the typical household's annual income.

Garage Addition — National Guide

See the full national cost guide with DIY tips, cost factors, and ROI analysis.

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