ADUs & Additions in Santa Clarita
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 Santa Clarita properties
Santa Clarita is a market we are asked about constantly, and it builds differently from the Valley. The city permits independently, the summers are hotter and drier, and most of the master-planned neighbourhoods carry an HOA that reviews your design before the city ever sees it. Plan for both approvals in parallel and the schedule holds; plan for one and it does not.
Master-planned family neighbourhoods with defined lots and active HOAs, plus larger semi-rural parcels toward the canyons.
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 Santa Clarita: Santa Clarita permits through its own Building & Safety Division, not LA County or LADBS. The city enforces an oak tree preservation ordinance, and many master-planned communities require HOA architectural approval before the city will finalise plans.
What We Build
- HOA design-review submissions
- Drought-tolerant planting and turf systems
- 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 Santa Clarita actually involves
Every city in Southern California builds differently. These are the things that change the scope, the schedule or the budget on Santa Clarita projects.
Master-planned Valencia tracts commonly require HOA design review alongside the city permit
Hot, dry summers push shade structures, turf and drought-tolerant planting
Newer tracts often have compact, well-defined lots that reward precise space planning
Protected oaks are common and affect excavation and layout
Investment
What this costs in Santa Clarita
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 Santa Clarita 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 Santa Clarita that submittal goes to City of Santa Clarita Building & Safety Division.
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.
Santa Clarita Questions
Common questions from Santa Clarita homeowners
Who issues the permits for this work in Santa Clarita?
City of Santa Clarita Building & Safety Division. Santa Clarita permits through its own Building & Safety Division, not LA County or LADBS. The city enforces an oak tree preservation ordinance, and many master-planned communities require HOA architectural approval before the city will finalise plans. 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 Santa Clarita different?
Master-planned family neighbourhoods with defined lots and active HOAs, plus larger semi-rural parcels toward the canyons. In practice that means master-planned Valencia tracts commonly require HOA design review alongside the city permit.
Which parts of Santa Clarita do you work in?
All of it, including Valencia, Saugus, Newhall, Canyon Country. We are based in Los Angeles at Cahuenga Pass, so Santa Clarita is a short run for our crews rather than a job we service from out of the area.
What does adus & additions cost in Santa Clarita?
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 Santa Clarita
Santa Clarita Guides
Planning guides for Santa Clarita homeowners
Costs, materials and process notes from our own projects.
Garage Conversion Cost in Santa Clarita: Line-Item Pricing
Garage conversions in Santa Clarita run $80,000 to $180,000, with most landing at $105,000 to $150,000. Here is the phase-by-phase cost and what HOA review and Valley heat add locally.
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 Santa Clarita?
Sit down with your project manager, go through the details, and get an accurate estimate for your property.
Licensed & Insured · LIC #1119054