Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Arlington, TX? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Arlington and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

When estimating the cost to build, consider the difference between a prefab unit and custom construction, as well as site preparation requirements like clearing trees or grading land. Labor and material prices also play a significant role. We provide an exact pricing confirmed free on the call.

Frequently asked in Arlington

What are the disadvantages of ADUs?

The primary disadvantage is the loss of your private yard space and the potential for increased property tax assessments. You must also consider the significant upfront investment required for utility installation and site excavation in Arlington. Maintaining two separate living structures can increase your overall home maintenance budget. Call us to discuss how to mitigate these factors for your Arlington home.

How much does an ADU cost in Massachusetts?

What are the rules for ADUs in California?

California building laws do not govern the construction of accessory dwelling units in Arlington. You must adhere to local Texas building codes and specific city ordinances regarding secondary units. Building without checking local regulations can result in expensive fines or demolition orders. Contact us to learn about the current rules that apply to your specific residential lot in Arlington.

Is ADU allowed in Maryland?

What are the rules for ADU in California?

Accessory dwelling rules in California are specific to that state and do not apply to your project in Arlington. You must follow the zoning requirements established by the city of Arlington to ensure your unit is compliant. Attempting to follow out-of-state rules will lead to project rejection. Speak with a local specialist to clarify the exact requirements for your Arlington lot.

Also serving nearby: Grand Prairie · Fort Worth · Irving · Dallas · Carrollton

All cities in Texas →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

398,431residents

4,157per sq mile

8ZIP codes served

Serving all of Arlington — population 398,431; about 4,157 residents per square mile across 95.8 sq mi. ZIP codes covered include 76001, 76002, 76003, 76004, 76005, 76006, 76007, 76010.

Neighborhoods served in Arlington: Dalworthington Gardens, Pantego, River Legacy, Crystal Canyon, West Arlington, South Arlington — and every surrounding area.