ADU Builder & Home Additions in Calabasas, CA
Source: https://www.remodelyourvibe.com/services/adus-additions/calabasas
Last modified: 2026-09-24T00:00:00.000Z
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Image: Open-plan living room and kitchen with polished concrete floors
- Calabasas
Design · Permit · Build
ADUs & Additions in Calabasas
Detached ADUs, garage conversions and additions, from plans to move-in.
Book a Consultation Call 818-300-2393
Built for Calabasas Homes
Calabasas has two approval processes running at once, and underestimating the second is the most common way a project slips. The city handles permits, but inside communities like The Oaks the HOA architectural review is a real gate with its own standards and its own calendar.
We start that conversation early. Protected oaks add a third constraint that quietly dictates where equipment can go.
Estate lots inside guard-gated communities where design review standards are high and the finish level expected is correspondingly high.
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 Calabasas: Calabasas permits through its own Building & Safety division and enforces an oak tree protection ordinance. The entire city is mapped as a Very High Fire Hazard Severity Zone on CAL FIRE's March 2025 map, and most gated communities add an HOA architectural review that runs in parallel with the city process.
Permit details checked September 2026 against City of Calabasas . Rules change, so we confirm them again for your parcel.
What We Build
- HOA architectural review packages
- Protected-oak-aware excavation planning
- 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 Calabasas
These local conditions change the scope, the schedule and the budget.
01
HOA architectural approval in communities like The Oaks is a real, separate gate that should be started early
02
Protected oaks constrain excavation footprints and equipment routing
03
Hillside parcels need engineered retaining and slope drainage
04
Fire-zone rules shape material selection and defensible-space planting
Areas we serve in Calabasas:The OaksMont CalabasasCalabasas ParkMountain View EstatesSaratoga Hills
Investment
What It Costs in Calabasas
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 Calabasas property
The Process
How We Work in Calabasas
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 Calabasas that submittal goes to City of Calabasas Community Development Department, Building & Safety.
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 Calabasas Homeowners Ask
Who issues the permits for this work in Calabasas?
City of Calabasas Community Development Department, Building & Safety. Calabasas permits through its own Building & Safety division and enforces an oak tree protection ordinance. The entire city is mapped as a Very High Fire Hazard Severity Zone on CAL FIRE's March 2025 map, and most gated communities add an HOA architectural review that runs in parallel with the city process.
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 Calabasas different?
Estate lots inside guard-gated communities where design review standards are high and the finish level expected is correspondingly high. One local condition that shapes the work: HOA architectural approval in communities like The Oaks is a real, separate gate that should be started early.
Which parts of Calabasas do you work in?
All of it, including The Oaks, Mont Calabasas, Calabasas Park and Mountain View Estates. 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 Calabasas?
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 Calabasas
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Planning Guides
Before You Build in Calabasas
Costs, materials and process notes from our own projects.
Backyard Transformation Cost in Calabasas Complete backyard transformations in Calabasas run $120,000 to $400,000. Here is the line-item cost of building on larger lots, plus what HOA architectural review, oak protection and fire zone rules add. Read guide Calabasas Pool Construction: Slopes, HOAs & Costs Calabasas pools require special considerations due to hillside lots and fire zone regulations. Here's the complete guide for Calabasas pool projects. Read guide Luxury Landscaping Ideas for Calabasas Homes Calabasas and Hidden Hills properties demand exceptional landscaping. Explore design ideas that match the area's luxury standards and create private estate environments. Read guide 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
Planning an ADU in Calabasas?
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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