Modular accessory dwelling unit — Lafayette, LA
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
A modular unit is built in a factory and then transported to your property to be finished on a foundation. You should consider this if you want a faster construction timeline with less disruption to your daily life. It is an efficient way to add high-quality space to your lot.
Frequently asked in Lafayette
What are the requirements for homes with mother-in-law suites in Lafayette?
What is involved in accessory dwelling unit construction in Lafayette?
What is the best accessory dwelling unit for my Lafayette home?
What services are offered for accessory dwelling units in Lafayette?
How do I get an ADU estimate in Lafayette?
What is the cost of an accessory dwelling unit in Lafayette?
What are the rules for accessory dwelling units in Lafayette?
Also serving nearby: Baton Rouge · New Orleans · Beaumont · Pasadena · League City
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Lafayette — population 121,467; about 2,168 residents per square mile across 56.0 sq mi. ZIP codes covered include 70501, 70502, 70503, 70504, 70505, 70506, 70507, 70508.
Neighborhoods served in Lafayette: Downtown Lafayette, River Ranch, South Lafayette, Oil Center, Broussard (nearby) — and every surrounding area.
Areas we serve
Browse by state, then city.