Cost to build accessory dwelling unit — Boca Raton, FL
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 Boca Raton
What are the rules for renting out an accessory dwelling unit in Boca Raton?
What are accessory dwelling unit homes like in Boca Raton?
What is the permit cost for an accessory dwelling unit in Boca Raton?
Are modular ADUs a good choice in Boca Raton?
Modular accessory dwelling units can be an excellent choice for homeowners in Boca Raton. They often streamline the construction process, potentially leading to faster completion times and more predictable budgeting. The quality and design options for modular ADUs are impressive. A specialist can assess if a modular unit is the right fit for your property and goals.
Who are the best accessory dwelling unit builders in Boca Raton?
What does an accessory dwelling unit cost in Boca Raton?
What's involved in ADU building in Boca Raton?
Also serving nearby: Pompano Beach · Coral Springs · Fort Lauderdale · Sunrise · Davie
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Boca Raton — population 99,974; about 3,426 residents per square mile across 29.2 sq mi. ZIP codes covered include 33427, 33428, 33429, 33431, 33432, 33433, 33434, 33464.
Neighborhoods served in Boca Raton: Mizner Park, Royal Palm Yacht & Country Club, Cinnamon Park, Boca Pointe, The Estates of Boca Raton — and every surrounding area.
Areas we serve
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