Question 1

How much does an ADU cost in Tustin and Orange County?

Accepted Answer

ADU costs in Tustin and the surrounding cities depend on whether you're converting an existing garage, adding to an attached structure, or building a detached unit from the ground up. A garage conversion is typically the most budget friendly option because the roof, slab, and framing are already in place. Detached units cost more because they require new foundations, utility trenching, and full exterior finishes. The best way to get an accurate number is to schedule a free estimate. Call (855) 360-9836 and we'll walk your lot, review your goals, and give you a written line item quote that reflects real conditions, not a guess over the phone.

Question 2

Will the price change once work starts?

Accepted Answer

Our estimates are based on a detailed site review and a fixed scope of work, so the number you see is the number you plan around. If the city requires something unexpected after plan review, or if you change the finishes or layout mid-project, we'll discuss that with you and provide a written change order before any additional work proceeds. No one gets surprised with an invoice they didn't approve. If you want to understand exactly how our fixed pricing works for your city, call (855) 360-9836 and we'll explain our process.

Question 3

Do you pull the permits for my city?

Accepted Answer

Yes. We prepare and submit the full permit package for whichever jurisdiction your property sits in, whether that's the City of Tustin, the County of Orange for unincorporated areas like North Tustin and Midway City, or another city in our service area. We coordinate plan review, revisions, and inspections from start to finish. You don't need to become an expert in your city's ADU ordinance, because that's our job. Call (855) 360-9836 to talk through the permit path for your specific property.

Question 4

How long does an ADU project take in Orange County?

Accepted Answer

The timeline depends on the type of unit, the jurisdiction, and how quickly plans clear review. A garage conversion typically moves faster than a detached ground up build because there's less foundation and framing work involved. Cities with higher plan review volumes, like Newport Beach and Huntington Beach, can add time to the front end, while smaller jurisdictions often turn around comments more quickly. We'll give you a realistic schedule for your specific city during the estimate. Call (855) 360-9836 to get the conversation started.

Question 5

Can you build a prefab ADU from Cover, Dvele, or Boxabl?

Accepted Answer

We offer prefabricated ADU options from select manufacturers including Cover, Dvele, and Boxabl for appropriate sites. Prefab can reduce on site construction time, but it requires access for delivery and crane placement, plus level ground and utility connections that are ready for a factory built unit. Not every backyard in Tustin or Costa Mesa can accommodate a module delivery, and we'll assess that honestly. If prefab isn't right for your lot, site built is still a strong option. Call (855) 360-9836 and we'll evaluate your property for both paths.

Written by the team at Fletcher ADU Builders, serving Tustin and Orange County since 2016.

Service Areas

Greater Tustin Area

Laguna Hills

Laguna Woods

Lake Forest

Aliso Viejo

Mission Viejo

Coto De Caza

Foothill Ranch

Portola Hills

Laguna Beach

Ladera Ranch

San Joaquin Hills

Nearby Communities

Irvine

Rancho Santa Margarita

Trabuco Canyon

Newport Beach

Tustin

Costa Mesa

North Tustin

Santa Ana

Fountain Valley

Orange

Extended Service Area

Villa Park

Huntington Beach

Midway City

El Cerrito Corona

Garden Grove

Anaheim

Westminster

Corona

Yorba Linda

Placentia

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