Flat Land in Woodland Hills: Survey, soils report, grading and permits. We stake the footprint and get the City of LA sign-off before a single shovel goes in.
New Foundation: Engineered footings, rebar and anchor bolts, inspected and poured. Hillside, slab or raised, we build the base everything else sits on.
Structural Framing: Walls, floor joists and roof rafters go up to the engineer's plan, with shear walls and hold-downs for Southern California seismic code.
Windows and Doors: Sheathing, house wrap and flashed openings, then the black-framed windows and the pivot entry door. The house is now sealed against the weather.
02Foundation

NEW FOUNDATION

Engineered footings, rebar and anchor bolts, inspected and poured. Hillside, slab or raised, we build the base everything else sits on.

03Framing

STRUCTURAL FRAMING

Walls, floor joists and roof rafters go up to the engineer's plan, with shear walls and hold-downs for Southern California seismic code.

04Windows & Doors

WINDOWS AND DOORS

Sheathing, house wrap and flashed openings, then the black-framed windows and the pivot entry door. The house is now sealed against the weather.

05Roofing

ROOFING

Underlayment and a standing seam metal roof, installed and flashed by our own crew. Built for heat, Santa Ana winds and fire zones.

06Exterior Finishes

EXTERIOR FINISHES

Smooth stucco, oak cladding, driveway and drought-tolerant landscaping. The outside is done, and it looks like it belongs on the street.

07Front Door

STEP INSIDE

From the curb to the front door. Every detail you touch daily, the hardware, the threshold, the light, is planned before we build.

08Living Space

OPEN LIVING SPACE

Double-height ceilings, white oak floors and floor-to-ceiling glass. Electrical, HVAC and insulation are all hidden behind finish-grade drywall.

09Kitchen

L-SHAPED CHEF'S KITCHEN

A big L-shaped layout around a waterfall-stone center island. Custom cabinetry, paneled appliances and lighting we lay out with you.

10Staircase

UP THE STAIRS

A floating oak staircase with frameless glass rail. Structural steel and finish carpentry, built in-house to tight tolerances.

11Master Bath

MASTER BATHROOM

Marble slab walls, a freestanding tub and a walk-in shower. Waterproofed, tiled and plumbed by our own team. High-end finish, done right.

Southern California · Design · Build · Remodel

WE BUILD LOS ANGELES HOMES,
FROM THE GROUND UP

Licensed design-build contractor for custom homes, additions, ADUs and full remodels. Scroll to watch us build a 5,000 sq ft home, step by step.

4.9 Verified on Google · Licensed & Insured
Los Angeles General Contractor

WHAT WE BUILD, WHAT IT COSTS, AND HOW LONG IT TAKES

1 Smart Build is a licensed, bonded and insured design-build general contractor working across Los Angeles County. We handle the whole job under one contract: measuring and drawing the plans, running them through plan check, pulling the permit, and then building the work with our own supervision on site every day. You are not hiring an architect, then a contractor, then chasing an inspector yourself.

Detached ADUs and garage conversions make up a large share of our work, and they typically run somewhere between $90,000 and $300,000 depending on whether we are converting an existing slab or pouring an entirely new foundation in the rear yard. Kitchen remodels start at $35,000 for a small kitchen, $55,000 for an average-size kitchen, and $80,000 and up for a large kitchen once custom cabinetry, new dedicated circuits and a properly vented range hood are all accounted for, while bathroom remodels start at $18,000 for a guest bath, $28,000 for mid-range, and $58,000 and up for a master suite. Room additions and second stories start around $150,000 and climb from there with the amount of foundation and framing reinforcement the existing house needs, and the same is true of structural work such as foundation replacement and seismic retrofit, where the engineering drives the number far more than the finishes do.

Timelines on almost every one of these projects depend far more on permitting than on the construction itself, which surprises most homeowners the first time they hear it. A bathroom takes roughly four to six weeks of actual work, a kitchen with a load-bearing wall removed is closer to nine or ten weeks, and an ADU or a room addition usually runs six to eleven months from the first drawing to the final inspection because a substantial chunk of that window is city review rather than crews on site. Before you sign anything, we tell you which department will be reviewing your project and roughly how long that particular office is taking right now, so the schedule you agree to is the schedule the city is actually working on.

We work in Woodland Hills, Encino, Sherman Oaks, Studio City, Burbank, Glendale, Calabasas, Pasadena, Santa Monica, the South Bay and everywhere between. Every project is permitted and inspected. If a lot has expansive soil, a hillside grading review, a protected tree or a coastal overlay, we would rather find it during the walkthrough than explain it to you later as a change order.

Straight Answers

THE QUESTIONS EVERYONE ASKS

Real numbers and timelines for Los Angeles, in plain language. Every dollar figure is a 2026 planning range for budgeting, not a quote.

Who is 1 Smart Build?

1 Smart Build is a licensed design-build general contractor in Woodland Hills, CA (CSLB #1076428), serving all of Los Angeles County. We design, permit and build residential projects under one contract.

What does a kitchen remodel cost in Los Angeles?

$35,000 to $60,000 for a cosmetic refresh in the same footprint, $60,000 to $100,000 with layout changes, and $100,000 to $180,000+ for luxury design-build. Planning ranges, not quotes.

What does a bathroom remodel cost in Los Angeles?

Bathrooms start at $18,000 for a guest bath, $28,000 for a mid-range full remodel, and $58,000 and up for a master suite.

What does an ADU cost in Los Angeles?

A garage conversion to a full ADU runs $110,000 to $150,000. An attached ADU of 500 to 750 sq ft runs $150,000 to $260,000. A detached ADU of 600 to 1,200 sq ft runs $180,000 to $350,000.

How long does a remodel take?

A bathroom is typically 3 to 4 weeks of construction, a kitchen 4 to 8 weeks. A ground-up custom home in the City of LA is realistically 22 to 34 months including design and plan check.

Do you handle permits and engineering?

Yes. Design, structural engineering, LADBS plan check submittal and corrections, inspections and certificate of occupancy are all managed by our team.

Is 1 Smart Build licensed and insured?

Yes. CSLB license #1076428 (Class B, General Building Contractor), a $1,000,000 general liability policy and workers' compensation on file. Anyone can verify the license at cslb.ca.gov.

How do I get a free estimate?

Call 1 (866) 419-8840 or use the free consultation form on our contact page. We review your scope, timeline and budget at no cost, then visit the property to prepare a fixed-price proposal.

Contact

HOW DO I CONTACT 1 SMART BUILD?

1 Smart Build Inc.

1 (866) 419-8840 info@1smart.build

21243 Ventura Blvd #133, Woodland Hills, CA 91364

Free consultation and site walkthrough, no obligation. California CSLB license #1076428, Class B — General Building Contractor.

Verified Credentials

LICENSED & INSURED. CHECK IT YOURSELF.

CSLB License

#1076428

Class B — General Building Contractor

Liability Insurance

$1,000,000

U.S. Specialty Insurance Company

Workers' Compensation

On File

Filed with the CSLB

Client Rating

4.9 / 5

168 verified reviews

Verify our license at the California Contractors State License Board, or read reviews on Google, Houzz, Yelp and BBB.

What We Build

LOS ANGELES DESIGN-BUILD GENERAL CONTRACTOR

1 Smart Build is a licensed, bonded and insured Los Angeles general contractor specializing in ADUs, SB9 lot splits, kitchen and bathroom remodeling, room additions, structural and foundation work, and custom new construction. As a full-service design-build firm, we manage design, engineering, permitting and construction under one roof, so homeowners across Los Angeles County and the San Fernando Valley get a single accountable team from foundation to final finishes.

Our office is on Ventura Blvd, so Woodland Hills and Calabasas are our backyard. Need a kitchen remodeler, a bathroom remodel, or a custom home builder? You get a fixed-price proposal from us and one crew that answers for the job from day one.

ADUS & GARAGE CONVERSIONS

Attached and detached Accessory Dwelling Units and garage conversions designed, permitted and built under California ADU law to add rental or family space.

SB9 LOT SPLIT & URBAN LOTS

Senate Bill 9 lot splits, two-unit developments and parcel maps with full permitting and construction across Los Angeles.

KITCHEN REMODELING

Custom kitchen design-build: cabinetry, stone countertops, islands, tile, lighting and appliance integration.

BATHROOM REMODELING

Full bathroom renovations with custom showers, vanities, tile and spa-grade finishes completed in 3–4 weeks.

ROOM ADDITIONS & SECOND STORIES

Room additions, home extensions and second-story additions that expand living space and home value.

STRUCTURAL, FOUNDATION & FRAMING

Foundation work, structural framing, seismic retrofits and engineering coordination for safe, code-compliant builds.

COMPLETE HOME REMODELS

Whole-home remodels combining design, demo, MEP, drywall, flooring and luxury finishes.

CUSTOM NEW CONSTRUCTION

Ground-up custom home design and construction from foundation to final finishes.

OUTDOOR LIVING & HARDSCAPING

Backyard hardscaping, landscaping, pools and outdoor kitchens for resort-grade outdoor living.

AREAS WE SERVE

We proudly serve homeowners and investors throughout Los Angeles County and the San Fernando Valley, including:

Woodland Hills · Sherman Oaks · Calabasas · Studio City · Encino · Tarzana · Beverly Hills · Santa Monica · Manhattan Beach · Burbank · Glendale · Pasadena · Northridge · Thousand Oaks · West Hills · Bel Air · Pacific Palisades · Topanga · Van Nuys · Reseda · Chatsworth · Granada Hills · North Hollywood · Toluca Lake

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