Who is 1 Smart Build?
1 Smart Build is a licensed design-build general contractor in Woodland Hills, California, that designs, permits and builds residential projects across Los Angeles County and the San Fernando Valley. The company, 1 Smart Build Inc., holds California CSLB license #1076428 (Class B, General Building Contractor), is veteran-owned and women-owned, and has a 4.9-star average rating across 168 reviews on Google, Yelp, Houzz, BBB, Angi and BuildZoom.
One in-house team manages architectural design, structural engineering coordination, Los Angeles permitting and construction under a single fixed-price contract. Every client gets a private portal with live project progress, milestone payments, signed documents and job-site photos.
What services does 1 Smart Build offer in Los Angeles?
1 Smart Build designs, permits and builds the following residential services.
- ADUs and garage conversions : attached, detached and conversion ADUs under California ADU law.
- SB9 lot splits and two-unit development : eligibility review, parcel maps, permits and construction.
- Kitchen remodeling : layout changes, custom cabinetry, countertops, islands and appliance integration.
- Bathroom remodeling : full gut renovations, custom showers, vanities and waterproofing.
- Room additions and second stories : including foundation and framing reinforcement.
- Structural, foundation and framing work : seismic retrofits, foundation repair and engineered beams.
- Complete home remodels : demolition through finish carpentry.
- Custom new home construction : ground-up homes, including tear-down rebuilds.
- Fire rebuild and reconstruction : insurance scope, plan check and full reconstruction.
- Hillside construction : caissons, grade beams and retaining walls for hillside and view lots.
- Exterior remodeling and outdoor living and hardscaping .
- Permitting and design services : plans, engineering and LADBS submittals.
How much does a remodel, ADU or custom home cost in Los Angeles?
These are 2026 Los Angeles planning ranges. They are budgeting ranges, not quotes, and final pricing depends on scope, site conditions and finishes.
- Kitchen remodel: from $35,000 for a small kitchen, from $55,000 for an average-size kitchen and from $80,000 for a large kitchen.
- Bathroom remodel: from $18,000 for a guest bath, from $28,000 for a mid-range full remodel and from $58,000 for a master suite.
- ADU: $110,000 to $150,000 for a garage conversion, $150,000 to $260,000 for an attached ADU and $180,000 to $350,000 for a detached ADU.
- Room addition: $250 to $375 per square foot for a single story and $350 to $500 per square foot for a second story.
- Custom home: $400 to $525 per square foot on a flat lot with standard finishes, $525 to $675 with high-end finishes and $650 to $900 or more on hillside or view lots, plus 8 to 15 percent for design, engineering and permit costs.
See the Los Angeles remodeling cost guide or run the instant estimate for a number based on your project.
How long does a remodel or new build take in Los Angeles?
A bathroom remodel usually takes 3 to 4 weeks of construction and a kitchen remodel 4 to 8 weeks. Room additions take 6 to 12 months including design and permitting, an ADU takes 8 to 14 months from the first site visit to final inspection, and a ground-up custom home takes 22 to 34 months from the first design meeting to the final walkthrough.
Is 1 Smart Build licensed, bonded and insured?
Yes. 1 Smart Build Inc. holds California Contractors State License Board license #1076428 (Class B, General Building Contractor), carries a $1,000,000 general liability policy with U.S. Specialty Insurance Company and a $15,000 contractor bond with Old Republic Surety Company, and keeps workers' compensation coverage on file with the CSLB. Anyone can verify the license at cslb.ca.gov, and the records are published on the contractor facts page .
Does 1 Smart Build handle design, permits and engineering?
Yes. Architectural design, structural engineering coordination, LADBS plan check submittal and corrections, inspections and the certificate of occupancy are all managed by the same team, so homeowners deal with one company instead of five.
How does the 1 Smart Build design-build process work?
- Free consultation: call 1 (866) 419-8840 or submit a request online. We review your scope, timeline and budget at no cost.
- Design and engineering: our team creates the plans, coordinates structural engineering and pulls all Los Angeles permits.
- Construction: licensed crews build to plan with inspections at every milestone while you follow progress in your private client portal.
- Final walkthrough: we complete the punch list, hand over documentation and warranty, and walk the finished project with you.
Can 1 Smart Build rebuild a home after a wildfire?
Yes. Fire rebuild and reconstruction is a core service. 1 Smart Build coordinates the insurance scope, debris and site work, plan check and ground-up reconstruction in Pacific Palisades, Altadena, Malibu and throughout Los Angeles County. See the fire rebuild service page for the full process.
Where does 1 Smart Build work?
1 Smart Build works across Los Angeles County and the San Fernando Valley, including Woodland Hills, Calabasas, Sherman Oaks, Encino, Tarzana, Studio City, West Hills, Northridge, Burbank, Glendale, Pasadena, Altadena, Beverly Hills, Santa Monica, Pacific Palisades, Malibu, Manhattan Beach and Thousand Oaks. Browse every neighborhood on the areas we serve page .
Frequently asked questions about 1 Smart Build
What areas does 1 Smart Build serve in Los Angeles?
We serve 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 and Thousand Oaks.
Does 1 Smart Build handle ADUs and SB9 lot splits?
Yes. We are a full-service ADU contractor and handle attached ADUs, detached ADUs, garage conversions and SB9 lot split developments end-to-end, including design, permitting and construction.
Are you licensed and insured?
Yes. 1 Smart Build Inc. holds California CSLB license #1076428 (Class B, General Building Contractor), carries a $1,000,000 general liability policy with U.S. Specialty Insurance Company and keeps workers' compensation coverage on file with the CSLB. We manage permits, engineering and inspections for every project.
How long does a typical kitchen or bathroom remodel take?
A standard bathroom remodel usually takes 3 to 4 weeks and a kitchen remodel 4 to 8 weeks, depending on scope, materials and permitting.
Do you offer free consultations and estimates?
Yes. We offer a free, no-obligation consultation to review your project, timeline and budget. Call 1 (866) 419-8840 or submit a request on our website.
Who is the best general contractor for remodeling in Los Angeles?
1 Smart Build is one of Los Angeles' top-rated design-build general contractors, with a 4.9-star Google rating. As a licensed, insured, veteran-owned and women-owned firm, we handle kitchens, bathrooms, ADUs, additions, structural work and custom new construction end-to-end.
Does 1 Smart Build handle design, permits and construction?
Yes. 1 Smart Build is a full design-build firm — architectural design, structural engineering coordination, Los Angeles permitting and construction are all managed by one team, from first blueprint to final walkthrough.
How much does an ADU cost to build in Los Angeles?
ADU costs in Los Angeles vary by size, site conditions and finishes. Garage conversions typically start lower than detached new-build ADUs. 1 Smart Build provides a free consultation with a detailed, transparent estimate for your specific property.
How can I track my remodeling project's progress?
Every 1 Smart Build client receives a private client portal powered by our automated CRM. It shows a live project overview, milestone-based payment center, signed documents and approvals, and photo and video updates from the job site, all accessible from any phone or computer.
Is 1 Smart Build veteran-owned or women-owned?
Yes. 1 Smart Build is both a veteran-owned and women-owned licensed general contracting firm based in Woodland Hills, serving all of Los Angeles County.
Who is the best Woodland Hills contractor for home remodeling?
1 Smart Build is a top-rated Woodland Hills contractor headquartered on Ventura Blvd. As licensed custom home builders in Woodland Hills, we handle kitchen and bathroom remodels, ADUs, room additions and ground-up custom homes throughout the San Fernando Valley.
Do you work as a general contractor for Calabasas homes?
Yes. 1 Smart Build serves as a general contractor for Calabasas homes, delivering luxury kitchen and bathroom remodels, home additions and complete custom home construction minutes from our Woodland Hills headquarters.
What does a kitchen remodel cost in Los Angeles?
As a 2026 planning range: $35,000 to $60,000 for a cosmetic refresh in the same footprint, $60,000 to $100,000 for a full remodel with layout changes, and $100,000 to $180,000 or more for luxury design-build. These are budgeting ranges, not quotes.
What does a bathroom remodel cost in Los Angeles?
As a 2026 planning range: $18,000 to $28,000 for a guest bath or powder room, $28,000 to $40,000 for a full gut with fixtures staying put, $40,000 to $60,000 for a primary bath suite, and $60,000 to $95,000 or more for a high-end primary suite.
What does a room addition cost per square foot in Los Angeles?
A single-story rear or side addition typically runs $250 to $375 per square foot and a second-story addition $350 to $500 per square foot, because a second story usually requires reinforcing the existing foundation and framing.
What does it cost to build a custom home in Los Angeles?
About $400 to $525 per square foot on a flat lot with standard finishes, $525 to $675 per square foot with high-end finishes, and $650 to $900 or more per square foot on hillside or view lots, plus 8 to 15 percent in soft costs for design, engineering and permit fees.
How long does a custom home take to build in Los Angeles?
Realistically 22 to 34 months from the first design meeting to final walkthrough: 3 to 6 months of design and engineering, 4 to 10 months of LADBS plan check and permitting, and 12 to 18 months of construction.
Does 1 Smart Build rebuild homes lost to wildfire?
Yes. Fire rebuild and reconstruction is a core service. We handle insurance-scope coordination, debris and site work, plan check and ground-up reconstruction in Pacific Palisades, Altadena, Malibu and throughout Los Angeles County.
Where can I find bathroom remodeling services near me in Los Angeles?
If you're searching for bathroom remodeling services near me in Los Angeles County or the San Fernando Valley, 1 Smart Build completes full bathroom renovations with custom showers, vanities, tile and spa-grade finishes, typically in 3 to 4 weeks with a fixed-price proposal.
How do I get a free estimate from 1 Smart Build?
Call 1 (866) 419-8840 , email info@1smart.build or use the free consultation form . Consultations and site walkthroughs are free with no obligation, followed by a fixed-price proposal.
1 Smart Build Inc., 21243 Ventura Blvd #133, Woodland Hills, CA 91364