Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Montgomery, AL? Call AccessoryDwellingUnit Solutions for a contact a provider — no obligation. Licensed adu builders serve Montgomery 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 budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

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When calculating the budget for a secondary unit, consider the costs for architectural design, permits, materials, and labor. Custom designs and high-end interior finishes will push your budget higher, while standardized layouts can keep costs more predictable. Exact pricing confirmed free on the call.

Frequently asked in Montgomery

What are the disadvantages of ADUs in Montgomery?

Potential disadvantages of adding an ADU in Montgomery include the initial construction costs and the impact on your existing yard space. You'll also need to navigate the city's specific zoning and building regulations. Careful planning with a qualified professional can help address these considerations and ensure a smooth process.

How much does an ADU cost in Alabama?

What are the rules for ADUs in Montgomery?

Is an ADU allowed in Alabama?

Yes, ADUs are permitted in Alabama, but regulations are set at the local city or county level. Montgomery has its own specific rules that must be followed for any ADU construction. It's important to work with professionals familiar with these local ordinances.

What are the rules for ADU in Alabama?

The rules for ADUs in Alabama are primarily dictated by individual municipalities. This means zoning laws, permitting procedures, and design standards can vary significantly from one city to another. For projects in Montgomery, understanding the city's specific ADU regulations is paramount.

While there may be financing options or local incentives available for ADUs in Montgomery, it's best to discuss your financial needs with a professional who can provide relevant advice.

Also serving nearby: Columbus · Hoover · Birmingham · Tuscaloosa · South Fulton

All cities in Alabama →

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

Service area details

195,287residents

1,221per sq mile

8ZIP codes served

Serving all of Montgomery — population 195,287; about 1,221 residents per square mile across 159.9 sq mi. ZIP codes covered include 36101, 36102, 36103, 36104, 36105, 36106, 36107, 36108.

Neighborhoods served in Montgomery: Capitol Heights, Garden District, Downtown Montgomery, Cloverdale, East Montgomery — and every surrounding area.