ADU Builder & Home Additions in Newport Beach, CA
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Last modified: 2026-09-24T00:00:00.000Z
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Image: Open-plan living room and kitchen with polished concrete floors
- Newport Beach
Design · Permit · Build
ADUs & Additions in Newport Beach
Detached ADUs, garage conversions and additions, from plans to move-in.
Book a Consultation Call 818-300-2393
Built for Newport Beach Homes
Almost everything we build here is shaped by water: the harbor, the water table, and the salt in the air. A pool on Balboa Island starts as a groundwater question before it becomes a design problem, while a Newport Coast backyard is a slope and HOA-palette problem.
We plan coastal review, alley access and crane staging early, because on a thirty-foot-wide lot the logistics decide the design.
Lot character swings hard between narrow, deep alley-served parcels on the islands and peninsula and larger graded hillside pads in Newport Coast and the bluff tracts. Rear yards on the older lots are compact and almost always accessed through a side gate or alley rather than a driveway.
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 Newport Beach: Residential plan check, permits and inspections run through the Building Division permit counter at the Civic Center on Civic Center Drive. Most harbor, island, peninsula and bluff property sits inside the Coastal Zone, and the city has issued its own Coastal Development Permits since its Local Coastal Program Implementation Plan took effect on January 30, 2017; certain geographic areas and project types remain appealable to the California Coastal Commission.
Dock and pier construction permits for work bayward of the bulkhead are processed separately by the Public Works Department, not the Building Division. Newport Coast and several bluff and island communities layer HOA architectural review on top of city review, and setback encroachments typically require a Modification Permit.
Permit details checked September 2026 against City of Newport Beach and Newport Beach Municipal Code . Rules change, so we confirm them again for your parcel.
What We Build
- Coastal Development Permit coordination
- Dewatering and hydrostatic pool design
- Marine-grade corrosion detailing
- 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 Newport Beach
These local conditions change the scope, the schedule and the budget.
01
Groundwater can be shallow on the islands and the peninsula, so the geotechnical report may call for dewatering during pool and spa excavation and hydrostatic relief in the finished shell. Dewatering discharge is regulated.
02
Salt-laden air accelerates corrosion on equipment pads, fasteners, railings and outdoor kitchen appliances, which pushes specifications toward marine-grade stainless, powder-coated aluminum and sealed enclosures.
03
Alley-loaded lots roughly thirty feet wide leave no room for a dozer or a full-size dump truck, so excavation is frequently conveyor, mini-excavator and street-permit staging work.
04
Bluff and coastal canyon parcels carry geotechnical stability setbacks that can move a pool or structure well inboard of the property line.
Areas we serve in Newport Beach:Corona del MarBalboa IslandBalboa PeninsulaNewport CoastLido IsleDover Shores
Investment
What It Costs in Newport Beach
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 Newport Beach property
The Process
How We Work in Newport Beach
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 Newport Beach that submittal goes to City of Newport Beach Community Development Department, Building 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 Newport Beach Homeowners Ask
Who issues the permits for this work in Newport Beach?
City of Newport Beach Community Development Department, Building Division. Residential plan check, permits and inspections run through the Building Division permit counter at the Civic Center on Civic Center Drive. Most harbor, island, peninsula and bluff property sits inside the Coastal Zone, and the city has issued its own Coastal Development Permits since its Local Coastal Program Implementation Plan took effect on January 30, 2017; certain geographic areas and project types remain appealable to the California Coastal Commission.
Dock and pier construction permits for work bayward of the bulkhead are processed separately by the Public Works Department, not the Building Division. Newport Coast and several bluff and island communities layer HOA architectural review on top of city review, and setback encroachments typically require a Modification Permit.
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 Newport Beach different?
Lot character swings hard between narrow, deep alley-served parcels on the islands and peninsula and larger graded hillside pads in Newport Coast and the bluff tracts. Rear yards on the older lots are compact and almost always accessed through a side gate or alley rather than a driveway.
One local condition that shapes the work: Groundwater can be shallow on the islands and the peninsula, so the geotechnical report may call for dewatering during pool and spa excavation and hydrostatic relief in the finished shell. Dewatering discharge is regulated.
Which parts of Newport Beach do you work in?
All of it, including Corona del Mar, Balboa Island, Balboa Peninsula and Newport Coast. 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 Newport Beach?
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 Newport Beach
Pool & Spa Remodeling in Newport Beach Backyard & Outdoor Living in Newport Beach Kitchen, Bath & Interior Remodeling in Newport Beach Plans, Permits & Design in Newport Beach Everything we build in Newport Beach
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Planning Guides
Before You Build in Newport Beach
Costs, materials and process notes from our own projects.
Newport Beach Pool and Spa Cost: Real 2026 Numbers New pool and spa costs for Newport Beach, broken into line items, plus what dewatering on the peninsula, liquefaction soils, coastal permits and harbor salt air actually add. Read guide Pool Remodeling Cost in Orange County: Complete Guide Orange County pool remodeling costs explained: replastering, tile replacement, coping, equipment upgrades, and complete pool renovations with real pricing examples. Read guide Pool Design Trends in Newport Beach Newport Beach pools face salt air, high expectations, and sophisticated homeowners. Explore the pool trends defining this iconic Orange County community. 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 Newport Beach?
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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