Detached ADU
Detached ADUs in Sacramento, CA
Definition
What is a detached adu?
A detached ADU is a separate, free-standing home built on the same lot as your main house. It has its own entrance, kitchen, bathroom and utilities. In Sacramento, detached ADUs are commonly allowed up to 1,200 square feet with 4 foot side and rear setbacks, making them the most flexible ADU type for rental income or family.
Who is a detached adu best for?
- Homeowners who want long-term rental income with real privacy for both households
- Families bringing aging parents or adult children home, close but not under one roof
- Lots with a deep backyard, an alley or side-yard access for construction
- Owners planning to downsize into the ADU later and rent the main house
How big can a detached adu be?
Detached ADUs in Sacramento are commonly allowed up to 1,200 square feet. Studios often land between 400 and 550 square feet, one-bedroom units between 550 and 750, and two-bedroom units between 750 and 1,200. Units under 750 square feet are exempt from certain impact fees, which is why many homeowners design right up to that line.
How long does a detached adu take?
Plan on roughly 9 to 14 months from first site visit to move-in. Design and engineering usually take 6 to 10 weeks, permitting and plan check 2 to 4 months depending on the jurisdiction, and construction 4 to 7 months. Using a pre-approved plan can shorten the permit stage.
How much does a detached adu cost in Sacramento?
$150,000 to $300,000+
Detached ADUs in the Sacramento area typically start around $150,000 and run to $300,000 or more. Size, foundation, utility runs from the street, site access and finish level drive most of the difference. New detached units also need solar under the California energy code, which we include in our pricing.
Costs and financing optionsRules in plain English
What are the Sacramento rules for a detached adu?
Rules vary by jurisdiction and change often. Call us to confirm what applies to your property.
- Sizecommonly up to 1,200 sq ft for a detached unit on a single-family lot.
- Setbacks4 ft from side and rear property lines is the typical minimum.
- Heightgenerally limited to one story in many cases, with taller allowances in some situations. We confirm this during feasibility.
- Parkinggenerally waived near transit, and never required to replace a lost garage when it is converted.
- Feesunits under 750 sq ft are exempt from certain impact fees.
- Owner occupancyrequirements are currently suspended through 2030.
- Solarnew detached ADUs generally require a solar PV system under the California Energy Code.
How we build it
How we design, permit and build your detached adu
- 01
Site and utilities first
We start with sewer depth, electrical panel capacity, water service and access, because these decide where the unit can go and what it will cost.
- 02
Design around the lot
Floor plans and 3D renderings are drawn for your lot, your sun and your privacy lines, not pulled from a catalog without thought.
- 03
One permit package
Architectural, structural, Title 24 energy and site plans are prepared and submitted together, then we answer every plan check comment.
- 04
Our crews, our schedule
Foundation, framing, rough-ins, inspections and finishes are built by our team on a written schedule with one point of contact.
Why choose a detached ADU over other types?
A detached ADU gives the most privacy and usually the highest rental value of any ADU type. Nobody shares a wall, a door or a driveway sound. For a renter, it feels like a small house, not a room in your house.
The tradeoff is cost and time. A detached unit needs its own foundation, roof, utilities and in most cases solar. If you already have a detached garage in good shape, a garage conversion may get you a similar result for less. We will tell you honestly which makes more sense on your lot.
Can I use a pre-approved plan in Sacramento?
Yes. The City of Sacramento offers free pre-approved ADU plans in studio, one-bedroom and two-bedroom layouts. They can save design fees and time in plan check. We can build from a city plan, adapt one to your lot where allowed, or design a custom unit when the pre-approved layouts do not fit your site or goals.
Ready to plan yours? See our full Design, Permit, Build process, browse design concepts, or read the Sacramento ADU rules guide.
Detached ADU gallery
Representative images. Completed project photos coming soon.
FAQ
Detached ADU questions
How big can a detached ADU be in Sacramento?
Detached ADUs in Sacramento are commonly allowed up to 1,200 square feet on a single-family lot. Units under 750 square feet are exempt from certain impact fees, so many owners design just under that size.
How close to the property line can a detached ADU be?
The typical minimum is 4 feet from side and rear property lines. Easements, utilities and fire separation can push the unit further in, which we check during the site visit.
Do I need solar on a detached ADU?
Generally yes. New detached ADUs usually need a solar PV system under the California Energy Code. We size it as part of the Title 24 energy calculations and include it in the build.
Can I rent out a detached ADU?
Yes. Detached ADUs can generally be rented long term, and owner-occupancy requirements are currently suspended through 2030. Short-term rental rules vary by city, so we confirm those for your address.
How long does a detached ADU take to build?
Most detached ADUs take about 9 to 14 months from first visit to move-in, including design, permits and roughly 4 to 7 months of construction.
Free quote
Get a quote for your detached adu.
Call us for a quote based on your project.
Call us directly
916.505.2036ADU Design Center2230 26th Street, Sacramento, CA 95818Call to schedule your visit.
Request a free quote
Takes about a minute. We call you back, usually the same business day.