Accessory Dwelling Unit (ADU) Construction in Quincy, MA — Costs $90,370 to $527,158
What does accessory dwelling unit (adu) construction cost in Quincy? Average $225,925, ranging $90,370–$527,158. Labor runs $49.27/hr locally — 51% above the national average. Free breakdown with material + labor split.
Quincy, MA Market
+51% vs nationalLabor Rate
$49.27/hr
Material Index
137
Avg Permit Cost
$2,439
Median Home Price
$570,160
Quincy is a mid-sized city in Massachusetts with a healthy pool of local contractors. Homeowners generally have several options to compare for a accessory dwelling unit (adu) construction, which helps keep pricing competitive. At 51% above the national average, Quincy 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 $570,160, this accessory dwelling unit (adu) construction represents just 39.6% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$90,370
National: $60,000
Mid-Range
$225,925
National: $150,000
High End
$527,158
National: $350,000
Per Sq Ft
$377
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Quincy
Adjusted for Quincy's labor rate ($49.27/hr) and material costs (index 137).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Quincy
$225,925
Based on 200 sq ft at mid quality, adjusted for Quincy market rates.
Local Cost Breakdown
At Quincy's average rate of $49.27/hr (64% above national avg)
Material cost index 137 (37% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Quincy
| Metric | Quincy | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $225,925 | $150,000 |
| Median Home Price | $570,160 | $350,000 |
| Project as % of Home Value | 39.6% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $102,265 | $75,000 |
What Affects the Price in Quincy
- 1Local labor rates ($49.27/hr in Quincy)
- 2Material cost index (137 vs national 100)
- 3Attached vs detached
- 4Size and bedroom count
- 5Kitchen and bath quality
- 6Local ADU regulations
Popular Upgrades
- Full kitchen
- Separate entrance
- Solar panels for energy independence
Other Projects in Quincy, MA
Second Story Addition
$301,233
Room Addition
$135,555
Swimming Pool Installation
$96,131
Garage Addition
$82,839
Home Addition
$119,404
Inground Swimming Pool
$95,246
Attic Conversion
$83,588
Swimming Pool Construction
$75,989
Accessory Dwelling Unit (ADU) Construction in Other Massachusetts Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Quincy
Building permits are typically required for a accessory dwelling unit (adu) construction in Quincy. The average permit fee in this area is $2,439, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 6-18 months from start to finish.
A accessory dwelling unit (adu) construction is a complex project best left to licensed professionals. In Quincy, skilled contractors charge an average of $49.27/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $102,265, many Quincy residents can budget for this project through savings. The mid-range cost of $225,925 represents 221% of the typical household's annual income.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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