Accessory Dwelling Unit (ADU) Construction in Lakewood, CO — Costs $69,830 to $407,342

Accessory Dwelling Unit (ADU) Construction Cost Calculator for Lakewood

Adjusted for Lakewood's labor rate ($36.23/hr) and material costs (index 112).

Local Cost Breakdown

Accessory Dwelling Unit (ADU) Construction vs. Home Value in Lakewood

Planning a Accessory Dwelling Unit (ADU) Construction in Lakewood

Building permits are typically required for a accessory dwelling unit (adu) construction in Lakewood. The average permit fee in this area is $2,035, 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 Lakewood, skilled contractors charge an average of $36.23/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.

For the median Lakewood household earning $74,420/year, this project at $174,575 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Financing the project? Compare current rates with Lakewood mortgage and HELOC rates to estimate monthly payments. For tax implications, mortgage interest deduction may apply — see SALT deduction guide.

Methodology & Local Data Sources

How we estimate accessory dwelling unit (adu) construction costs in Lakewood: Our local cost figure of $174,575 for Lakewood, CO is calculated by adjusting the national mid-range baseline of $150,000 using two location-specific factors:

1. Labor adjustment — 50%% of the project cost is labor. We multiply this by Lakewood's wage index, derived from BLS Occupational Employment and Wage Statistics for construction workers (SOC 47-0000). Lakewood skilled-trade labor averages $36.23/hr, compared to the national construction worker median.
2. Materials adjustment — 50%% of cost is materials. Lakewood's material cost index is 112 (national baseline = 100), based on regional shipping, lumber, concrete, and metal prices tracked by the Bureau of Labor Statistics Producer Price Index for Construction Materials.
3. Permit fees add $2,035 on average in Lakewood. Permit costs vary by project scope, square footage (200 sqft typical), and inspection requirements set by the local building department.
4. Cost-per-square-foot for this project in Lakewood: approximately $873/sqft, useful for comparing bids from contractors.

Authoritative data sources (US gov):

• BLS — Construction and Extraction Occupations Wages — labor rate baseline for Colorado
• BLS Producer Price Index — Construction Materials — monthly materials cost tracking
• U.S. Census Bureau — Lakewood QuickFacts — household income, demographics, housing
• DOE Building Energy Codes Program — energy efficiency requirements affecting accessory dwelling unit (adu) construction permits
• International Code Council (ICC) — IBC, IRC, and IECC code references most Colorado jurisdictions adopt
• EPA RRP Rule — Renovation, Repair, and Painting compliance for pre-1978 homes

Disclaimer: Cost estimates are based on regional averages and modeling — actual quotes from licensed contractors in Lakewood may vary ±15% based on project complexity, contractor backlog, and material availability. Always obtain at least 3 written bids before committing.

Reviewed by Brazora Monk · Last updated 2026

Find a Licensed Contractor + Permits in Lakewood

For a accessory dwelling unit (adu) construction in Lakewood, Colorado, you'll need a state-licensed contractor and (in most cases) a building permit. Use these official lookup tools instead of trusting general directory sites:

Why this matters: Hiring an unlicensed contractor in Colorado can void your homeowner's insurance, leave you liable for worker injuries, and result in code-violation fines. Always verify license + insurance before signing contracts.