ADU Construction in
Fountain Valley CA —
Rental Unit or In-Law Suite
Milano Kitchen & Bath builds accessory dwelling units throughout Fountain Valley CA and Orange County — from design and permitting through framing, plumbing, electrical, and final finish work. Find out what is possible on your lot.
California law has made ADU construction more accessible than ever. Find out what is possible on your lot — no obligation, no cost.
Milano Kitchen & Bath builds accessory dwelling units throughout Fountain Valley CA and Orange County for homeowners looking to add rental income, multigenerational living space, or a private guest house to their property.
Since 2000, our team has managed the full ADU construction process — from design and permitting to framing, plumbing, electrical, and final finish work. Call (714) 964-8500 to start the conversation.
Milano Kitchen & Bath is an ADU construction company in Fountain Valley, California, serving Orange County homeowners since 2000. The company designs and builds attached ADUs, detached ADUs, garage conversion ADUs, and junior ADUs throughout Orange County. Milano manages the full process from design and permitting through construction and final inspection. The business holds a perfect 5.0-star Google rating.
Types of ADUs
Milano Builds
Detached
ADU
A fully independent structure on the same lot as your primary home — its own entrance, kitchen, bathroom, and living space. Detached ADUs offer the highest degree of privacy and rental flexibility. California law allows them on most single-family lots in Orange County.
- Completely separate structure from primary home
- Own entrance, kitchen, bathroom, and living area
- Maximum rental flexibility and privacy
- Permitted on most OC single-family lots
- Foundation, full framing, all utilities
Attached
ADU
Connected to your primary home but with a completely separate entrance. Ideal for an in-law suite, adult child apartment, or rental unit without the footprint of a detached structure. Milano designs attached ADUs that share a wall but maintain complete functional independence.
- Shares a wall with the primary home
- Completely separate entrance and utilities
- Ideal for in-law suites or adult children
- Smaller footprint than detached ADU
- Full kitchen, bath, and living space
Garage
Conversion ADU
Converting an existing garage into a living space is one of the most cost-effective ADU paths in California. Milano handles the full conversion — insulation, framing, electrical upgrade, plumbing rough-in for a bathroom and kitchenette, flooring, and permit compliance. The existing structure reduces cost significantly.
- Most affordable ADU type — existing structure reused
- Full insulation, framing, and drywall
- Electrical panel upgrade as needed
- Plumbing for bathroom and kitchenette
- Flooring, finishes, and permit compliance
Junior ADU
(JADU)
Created within the existing footprint of your home — typically from a bedroom or unused room — with its own entrance and a kitchenette. California law allows JADUs up to 500 sq ft within existing primary structures, making them an accessible entry-level ADU option with minimal construction impact.
- Built within existing home footprint — no addition needed
- Up to 500 sq ft per California law
- Own entrance and kitchenette required
- Lowest construction cost of all ADU types
- Permitted in most Fountain Valley homes
ADU Construction Process —
Fountain Valley & Orange County
ADU construction is more complex than a standard remodel — it requires architectural drawings, energy compliance, permitting, and full structural work. Milano manages every phase so you never have to coordinate between architects, engineers, and contractors yourself.
California ADU Law — What
Fountain Valley Homeowners
Should Know
California has passed multiple laws since 2017 that have significantly reduced barriers to ADU construction. Milano stays current on California ADU law so we can tell you exactly what is possible on your specific property.
Free ADU
Feasibility Review
We assess your specific property — lot size, setbacks, utilities, and zoning — and tell you exactly which ADU types you can build and approximately what it will cost. No obligation, no cost.
Request Your Review (714) 964-8500ADU Construction Across
Orange County
Milano Kitchen & Bath builds ADUs throughout all of Orange County. Each property is assessed individually — lot size, setbacks, utilities, and zoning all factor into what is possible. Contact us to start your free property feasibility review.
What Our Clients Say
About Milano
Questions About
ADU Construction in
Fountain Valley
Everything you need to know before building an ADU on your Orange County property. Still have questions? We are one call away.
Milano Kitchen & Bath provides free consultations and custom ADU quotes based on your property and the ADU type. Garage conversion ADUs are typically the most affordable starting point. Detached ADUs cost more due to foundation, full framing, and separate utility connections. Call (714) 964-8500 for an estimate based on your specific lot and goals.
Milano Kitchen & Bath estimates ADU construction takes 4 to 8 months from permit approval through occupancy, depending on ADU type and scope. Garage conversions run faster. Detached ADUs take longer due to foundation and full structural work. Permit processing timelines vary by city. We manage the full timeline and keep you updated throughout.
Yes. ADUs built in Fountain Valley and across California can be rented out as independent dwelling units. California law prohibits cities from imposing owner-occupancy requirements as a condition of ADU approval for units built after 2020. Milano Kitchen & Bath builds ADUs to full residential code so your unit is ready for rental upon receiving its certificate of occupancy.
Milano Kitchen & Bath manages all ADU permits as part of our construction process. ADU permits require architectural drawings, Title 24 energy compliance documentation, and review by the City of Fountain Valley Building and Safety Division. We handle all submissions and coordinate inspections at each phase so you never have to manage the permit process yourself.
Milano Kitchen & Bath builds both ADUs and room additions. An ADU is a fully independent dwelling unit with its own entrance, kitchen, and bathroom. A room addition expands your existing living space without creating a separate unit. ADUs are designed for independent habitation and can be rented. Room additions are integrated into your primary home and cannot be separately occupied.
Other Services by Milano
Get Your Free
ADU Property Review
Ready to explore an ADU on your Fountain Valley or Orange County property? Fill out the form and our team will be in touch within 1 business day — no obligation, no cost.