Accessory Dwelling Unit (ADU) Construction in Frederick, MD — Costs $72,760 to $424,433
What does accessory dwelling unit (adu) construction cost in Frederick? Average $181,900, ranging $72,760–$424,433. Labor runs $37.96/hr locally — 21% above the national average. Free breakdown with material + labor split.
Frederick, MD Market
+21% vs nationalLabor Rate
$37.96/hr
Material Index
116
Avg Permit Cost
$1,748
Median Home Price
$451,778
In a smaller market like Frederick, Maryland, the pool of contractors specializing in accessory dwelling unit (adu) construction may be more limited. Getting 3+ quotes is especially important to ensure fair pricing. At 21% above the national average, Frederick is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. The median home in Frederick is valued at $451,778, putting this project at about 40.3% of home value — a moderate investment with a projected 80% ROI.
Low Estimate
$72,760
National: $60,000
Mid-Range
$181,900
National: $150,000
High End
$424,433
National: $350,000
Per Sq Ft
$303
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Frederick
Adjusted for Frederick's labor rate ($37.96/hr) and material costs (index 116).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Frederick
$181,900
Based on 200 sq ft at mid quality, adjusted for Frederick market rates.
Local Cost Breakdown
At Frederick's average rate of $37.96/hr (27% above national avg)
Material cost index 116 (16% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Frederick
| Metric | Frederick | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $181,900 | $150,000 |
| Median Home Price | $451,778 | $350,000 |
| Project as % of Home Value | 40.3% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $80,541 | $75,000 |
What Affects the Price in Frederick
- 1Local labor rates ($37.96/hr in Frederick)
- 2Material cost index (116 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 Frederick, MD
Second Story Addition
$242,533
Room Addition
$109,140
Swimming Pool Installation
$78,139
Garage Addition
$66,697
Home Addition
$96,592
Inground Swimming Pool
$77,796
Attic Conversion
$66,986
Swimming Pool Construction
$60,897
Accessory Dwelling Unit (ADU) Construction in Other Maryland Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Frederick
Building permits are typically required for a accessory dwelling unit (adu) construction in Frederick. The average permit fee in this area is $1,748, 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 Frederick, skilled contractors charge an average of $37.96/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $80,541, many Frederick residents can budget for this project through savings. The mid-range cost of $181,900 represents 226% 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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