ADUs & Additions in Woodland Hills
Detached ADUs, garage conversions, room additions and second storeys, designed, permitted and built. Designed, permitted and built by our own crews.
ADUs & Additions built for Woodland Hills properties
Woodland Hills gets hot, and that single fact should shape the whole design. A beautiful backyard nobody uses between June and September is a wasted investment, so shade, water and evening lighting matter more here than almost anywhere else in the Valley. Walnut Acres lots have the depth to do it properly; the southern hillside parcels need engineering first.
Big suburban lots with genuine backyard depth, plus hillside view properties climbing toward the Santa Monica Mountains.
We are a design-build team, which means the people who draw your project are the people who build it. Design, engineering, permits and construction run through one project manager and our own crews, so nothing gets lost in a handoff between a salesperson and a subcontractor. We are licensed and insured, LIC #1119054.
Permits in Woodland Hills: Private pools in the City of Los Angeles are permitted through a combined Building-Mechanical permit. Plumbing plan check applies to apartment and commercial pools, not single-family homes, and using an LADBS pre-approved standard plan shortens plan check. Parcels in the southern hills sit in the Hillside Grading Area, and much of that area is mapped as a Very High Fire Hazard Severity Zone.
What We Build
- Shade structures and heat mitigation
- Hillside retaining and drainage engineering
- Detached ADUs, ground-up
- Garage conversions to living space
- Junior ADUs within the main house
- Room additions and bump-outs
- Second-storey additions
- Full kitchens and bathrooms in the ADU
- Separate utility metering where required
- Private entries, patios and landscaping
- Plans, engineering and city submittals
- Title 24 energy compliance
Local Conditions
What building in Woodland Hills actually involves
Every city in Southern California builds differently. These are the things that change the scope, the schedule or the budget on Woodland Hills projects.
Walnut Acres offers flat, deep lots that take full backyard transformations well
Southern hillside parcels need engineered retaining and careful drainage design
Summer heat here is among the highest in the Valley, which pushes shade structures, misting and pool cooling up the priority list
Investment
What this costs in Woodland Hills
Real Southern California ranges, not a teaser number. Every project is priced line by line after we have seen the site.
Detached ADU
$150,000 to $400,000+
What moves it: square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build
Garage conversion ADU
$80,000 to $180,000
What moves it: whether the existing slab and framing meet current code, how far utilities have to run, and the finish level of the kitchen and bathroom
Plans, drawings and permit management
$4,500 to $25,000+
What moves it: project type and size, whether structural engineering, Title 24 or a soils report is required, and how many jurisdictions or review bodies are involved
How We Build
Your Woodland Hills project, step by step
Feasibility
We check lot size, setbacks, utilities and access to confirm what your property will actually support.
Design & 3D
Layout, elevations and finishes, modelled in 3D so you approve the unit before submittal.
Plans & Permits
We prepare the full drawing set, handle engineering and Title 24, and manage the city submittal and corrections. In Woodland Hills that submittal goes to Los Angeles Department of Building and Safety (LADBS).
Foundation & Framing
Site prep, foundation, framing and dry-in by our own crews.
Systems & Finishes
Electrical, plumbing, HVAC, insulation, then kitchen, bath and interior finishes.
Final Inspection
We pass final inspection, walk the unit with you and hand over the keys.
Woodland Hills Questions
Common questions from Woodland Hills homeowners
Who issues the permits for this work in Woodland Hills?
Los Angeles Department of Building and Safety (LADBS). Private pools in the City of Los Angeles are permitted through a combined Building-Mechanical permit. Plumbing plan check applies to apartment and commercial pools, not single-family homes, and using an LADBS pre-approved standard plan shortens plan check. Parcels in the southern hills sit in the Hillside Grading Area, and much of that area is mapped as a Very High Fire Hazard Severity Zone. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing the city.
What makes building in Woodland Hills different?
Big suburban lots with genuine backyard depth, plus hillside view properties climbing toward the Santa Monica Mountains. In practice that means walnut Acres offers flat, deep lots that take full backyard transformations well.
Which parts of Woodland Hills do you work in?
All of it, including Walnut Acres, Warner Center, Vista de Oro, Carlton Terrace. We are based in Los Angeles at Cahuenga Pass, so Woodland Hills is a short run for our crews rather than a job we service from out of the area.
What does adus & additions cost in Woodland Hills?
Detached ADU in this market generally runs $150,000 to $400,000+. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone.
How long does an ADU take start to finish?
Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access.
Is a garage conversion cheaper than a detached ADU?
Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code.
Can I rent the ADU out?
California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income.
Do you handle the permits?
Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off.
More services in Woodland Hills
Woodland Hills Guides
Planning guides for Woodland Hills homeowners
Costs, materials and process notes from our own projects.
New Pool Cost in Woodland Hills: A Full Build Priced Line by Line
A new pool in Woodland Hills costs $85,000 to $160,000. This walks through every construction phase with real dollar figures and explains what hillside soils, caissons and Valley heat add.
Read guideADU Cost Breakdown by Size in Los Angeles
A detached ADU in Los Angeles runs $150,000 to $400,000-plus. Here is the real cost broken down by unit size, with the soft costs, utility work and finish decisions that move the number.
Read guideGarage Conversion to ADU: The Step-by-Step Build
A garage conversion runs $80,000 to $180,000 in Southern California. Here is the real sequence, from slab testing and plan check to the raised floor, the mini-split and final sign-off.
Read guideADU Rental Income Maths in the San Fernando Valley
A one-bedroom ADU in the San Fernando Valley rents for roughly $2,100 to $2,900 a month. Here is the honest arithmetic on payback, carrying costs and what the unit adds to the property.
Read guidePlanning adus & additions in Woodland Hills?
Sit down with your project manager, go through the details, and get an accurate estimate for your property.
Licensed & Insured · LIC #1119054