Accessory dwelling unit services

Looking for accessory dwelling unit services in San Bernardino, CA? Call AccessoryDwellingUnit Solutions for a contact a provider — no obligation. Licensed adu builders serve San Bernardino 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.

About this service

These services cover the entire lifecycle of a backyard home, from initial property assessments to navigating local permit applications. You need this when you want to add living space but don't want to handle the complex zoning paperwork or design requirements yourself. Professionals guide you through the rules to ensure your project stays compliant with state and city codes while maximizing your property’s potential for rental income or housing family members.

Frequently asked in San Bernardino

What are the disadvantages of ADUs in California?

How much does an ADU cost in San Bernardino?

Costs vary based on size, materials, and site conditions, but we can provide a precise quote. Factors like foundation needs and utility hookups in San Bernardino play a big role. The best way to get an accurate figure is to speak with a specialist. They'll assess your specific situation.

What are the rules for ADUs in California?

California has state-mandated ADU laws, but local San Bernardino ordinances also apply. These cover setbacks, height limits, and parking requirements. Our affiliated pros are up-to-date on these regulations. They'll ensure your project meets all necessary codes.

Is an ADU allowed in Maryland?

This service focuses on California cities, including San Bernardino. Maryland has its own set of ADU regulations. If you're looking for ADU services in Maryland, you'll need to find a local provider there. We specialize in California's unique building environment.

While grants can be a resource, their specifics change. We don't manage grant programs directly but can advise on common funding avenues. The most important step is getting a clear project scope and cost estimate first. Then we can discuss potential financial strategies.

What are the rules for ADU in California?

California has statewide ADU laws designed to encourage their development, but local San Bernardino rules are also important. These often dictate lot coverage, garage conversions, and impact fees. A qualified professional can help you navigate both state and local requirements. Ensuring compliance is key to a successful ADU project.

Also serving nearby: Rialto · Fontana · Jurupa Valley · Rancho Cucamonga · Riverside

All cities in California →

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

Service area details

223,728residents

3,602per sq mile

8ZIP codes served

Serving all of San Bernardino — population 223,728; about 3,602 residents per square mile across 62.1 sq mi. ZIP codes covered include 92401, 92402, 92403, 92404, 92405, 92406, 92407, 92408.

Neighborhoods served in San Bernardino: Muscoy, Arrowhead, Downtown San Bernardino, North San Bernardino, South San Bernardino — and every surrounding area.