ADU Builder & Home Additions in Torrance, CA
Source: https://www.remodelyourvibe.com/services/adus-additions/torrance
Last modified: 2026-09-24T00:00:00.000Z
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Image: Detached backyard ADU with wood siding and black-framed glass doors at dusk
- Torrance
Design · Permit · Build
ADUs & Additions in Torrance
Detached ADUs, garage conversions and additions, from plans to move-in.
Book a Consultation Call 818-300-2393
Built for Torrance Homes
Most of this city is straightforward flat-lot work with real rear yards. The exception is the west side. Properties inside the Hillside Overlay, adopted in 1977, go through a formal development review that weighs a project's effect on neighbors' view, light, air and privacy. We plan around that process instead of discovering it mid-design.
Predominantly single-story postwar tract lots with genuinely usable flat rear yards, plus steeper view parcels along the western hillside.
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, bonded and insured, CSLB license #1119054 .
Permits in Torrance: Permits are issued by the Building and Safety Division of the Community Development Department, with the Permit Center on Torrance Boulevard and permit records searchable through the City's online portal. Properties within the Hillside and Local Coastal Overlay District, adopted by the City Council in 1977 and applied to the hillside and coastal areas shown on the City's Hillside Overlay Map, go through an additional development review that weighs impacts on view, light, air and privacy.
Because Torrance has no certified Local Coastal Program, Coastal Zone projects may also need review by the California Coastal Commission. Separate trade permits are required for mechanical, electrical and plumbing work.
Permit details checked September 2026 against California Coastal Commission . Rules change, so we confirm them again for your parcel.
What We Build
- Hillside Overlay development review
- Panel upgrades and repiping on tract homes
- Flat-lot pool and ADU packages
- Detached ADUs, ground-up
- Garage conversions to living space
- Junior ADUs within the main house
- Room additions and bump-outs
- Second-story 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 to Know in Torrance
These local conditions change the scope, the schedule and the budget.
01
Hillside lots on the western edge step down from the street, so additions and pools there require retaining, deepened footings and drainage engineered away from downhill neighbors.
02
Flat inland tracts sit on sandy alluvium with generally predictable excavation, which keeps pool and detached-structure foundation costs stable.
03
Postwar tract houses often retain original electrical services and galvanized supply lines, so a pool or outdoor kitchen commonly triggers a panel upgrade and partial repipe.
04
Low-lying ground near the Walteria basin can carry shallow groundwater that affects deep excavation and requires dewatering.
Areas we serve in Torrance:Hollywood RivieraOld TorranceWalteria
Investment
What It Costs in Torrance
Real Southern California price ranges, not teaser numbers.
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
Your lot, access and finishes set the price. We walk the site, then show you where every dollar goes.
Get a line-item price for your Torrance property
The Process
How We Work in Torrance
01
Feasibility
We check lot size, setbacks, utilities and access to confirm what your property will actually support.
02
Design & 3D
Layout, elevations and finishes, modeled in 3D so you approve the unit before submittal.
03
Plans & Permits
We prepare the full drawing set, handle engineering and Title 24, and manage the city submittal and corrections. In Torrance that submittal goes to City of Torrance Community Development Department, Building and Safety Division.
04
Foundation & Framing
Site prep, foundation, framing and dry-in by our own crews.
05
Systems & Finishes
Electrical, plumbing, HVAC, insulation, then kitchen, bath and interior finishes.
06
Final Inspection
We pass final inspection, walk the unit with you and hand over the keys.
Questions
What Torrance Homeowners Ask
Who issues the permits for this work in Torrance?
City of Torrance Community Development Department, Building and Safety Division. Permits are issued by the Building and Safety Division of the Community Development Department, with the Permit Center on Torrance Boulevard and permit records searchable through the City's online portal.
Properties within the Hillside and Local Coastal Overlay District, adopted by the City Council in 1977 and applied to the hillside and coastal areas shown on the City's Hillside Overlay Map, go through an additional development review that weighs impacts on view, light, air and privacy.
Because Torrance has no certified Local Coastal Program, Coastal Zone projects may also need review by the California Coastal Commission. Separate trade permits are required for mechanical, electrical and plumbing work. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.
What makes building in Torrance different?
Predominantly single-story postwar tract lots with genuinely usable flat rear yards, plus steeper view parcels along the western hillside. One local condition that shapes the work: Hillside lots on the western edge step down from the street, so additions and pools there require retaining, deepened footings and drainage engineered away from downhill neighbors.
Which parts of Torrance do you work in?
All of it, including Hollywood Riviera, Old Torrance and Walteria. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.
What does an ADU or addition cost in Torrance?
Detached ADU: generally $150,000 to $400,000+ across Southern California. 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 Torrance
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Planning Guides
Before You Build in Torrance
Costs, materials and process notes from our own projects.
ADU 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 guide Garage 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 guide ADU Rental Income Math 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 guide Second Story Addition vs Building Out: Which Costs Less Building out runs $350 to $500 per square foot. Going up runs $450 to $700. Here is when the cheaper option is actually the wrong one, and what drives each number. Read guide
Planning an ADU in Torrance?
Sit down with your project manager and get an accurate estimate. We call you back within one business day.
Book a Consultation 818-300-2393
Licensed, bonded & insured · CSLB license #1119054
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