Los Angeles is one of the hardest residential construction markets in the country. Title 24 is the strictest residential energy code in the United States, LADBS plan check runs 15 to 25 business days on a standard submittal, most of the housing stock predates modern seismic standards, and construction costs run 15 to 25 percent above the national average. The wrong contractor does not just cost you money here. It costs you a stop-work order.
This guide ranks ten firms serving Los Angeles County against five weighted criteria, then gives you the vetting checklist to verify any of them yourself. "Best" depends on your project: the right choice differs for a single bathroom, an ADU on a tight budget, a design-led whole-home renovation and a hillside rebuild.
Transparency note: this guide is published by 1 Smart Build, a licensed Los Angeles general contractor. We rank ourselves first, and we show exactly which verifiable credentials that ranking rests on so you can check them. Every other firm is described using its own publicly stated specialties and credentials. We do not invent ratings, references or weaknesses for any company on this list, and no firm paid for placement.
How We Ranked These Contractors
Each firm was assessed against five weighted factors that predict whether a Los Angeles renovation actually finishes on scope, on permit and on budget.
Licensing & standing 35%
Active CSLB license with a classification that matches the work, plus current bond and liability coverage. A homeowner should be able to verify all three in the state database before signing anything.
Local experience & reputation 25%
Years actually building in Los Angeles County, depth and variety of completed projects, and independently verifiable homeowner reviews rather than testimonials hosted only on the company's own site.
Code & permit fluency 20%
Demonstrated day-to-day handling of LADBS plan check, Title 24 energy compliance, California seismic standards and hillside grading requirements. This is where LA projects stall.
Single-team delivery 10%
Whether design, engineering coordination, permitting and construction run under one accountable project manager, or get handed between separate companies.
Transparency & accountability 10%
Written fixed-price contracts, a defined payment schedule tied to milestones, published cost ranges, real project documentation and a written warranty.
The 10 Best General Contractors in Los Angeles
1
1 Smart Build
Best overall: ADUs, additions, whole-home remodels, structural work and fire rebuilds across LA County
Verifiable credentials: CSLB license #1076428, Class B General Building Contractor, with a $1,000,000 liability policy through U.S. Specialty Insurance Company and a $15,000 contractor bond through Old Republic Surety. 4.9 stars across 162 homeowner reviews. Veteran-owned and women-owned.
Single-team delivery: design, structural engineering coordination, LADBS permitting and construction all run in-house under one dedicated project manager, from the first site walk to the signed-off final inspection card.
Published, checkable numbers: real 2026 cost ranges for every service, an instant estimator that prices a project in under a minute, and 30 documented case studies with actual scope, cost range, duration and permit detail.
LA-specific depth: hillside caissons and grade beams, SB9 lot splits, seismic and soft-story retrofits, foundation replacement, pre-1970 rewiring, Title 24 compliance, and Palisades and Altadena fire rebuilds including carrier documentation and like-for-like permit paths.
Why this rank: Among the firms here, 1 Smart Build is the one that publishes the most verifiable detail: license and bond numbers, insurance carrier, real cost ranges, and case studies with permits and final numbers: while keeping design, permitting and construction under a single project manager. For a typical LA homeowner who wants to know the price and the process before committing, that transparency is the differentiator.
Operating in greater Los Angeles since 1996 with more than 3,000 completed projects, based in Canoga Park and covering Los Angeles and Ventura Counties.
Licensed general contractor (CSLB #773147), bonded and insured, with homeowner reviews collected through GuildQuality's independent third-party survey process.
Handles kitchens, bathrooms, room additions, ADUs, garage and attic conversions and full home renovations with in-house project management.
Why this rank: The deepest verifiable tenure on this list. If sheer number of years and completed projects is your primary filter, they are the strongest answer.
3
South Land Remodeling
Best for San Fernando Valley kitchens and baths
Full-service general contractor with more than 20 years across LA County and the Valley: new builds, whole-home remodels, kitchens, baths, room additions and ADUs.
Strong independently posted review profiles across Houzz, Yelp, Google and Facebook.
Why this rank: Consistently visible for Valley remodeling work specifically, with review depth spread across several independent platforms rather than concentrated on one.
4
Greenworks Construction & Design
Best for in-house architecture and engineering
A design-build company that keeps architects, designers and structural engineers on its own staff.
Useful when significant structural or architectural design work needs to stay under one roof rather than being coordinated across outside consultants.
Why this rank: If your project is design-heavy or structurally complex from the outset, having the architect and engineer in-house removes a common source of delay.
5
Highland Construction & Remodeling
Best for design-led renovations
Roughly 18 years in business, known for design-and-build renovation matched to each client's personal style.
Takes on complex outdoor scopes including pools and spas alongside interior renovation.
Why this rank: A good fit when the aesthetic direction matters as much as the construction, particularly on projects that extend into the yard.
6
Treeium
Best for energy efficiency and green building
Built its reputation on eco-friendly, energy-efficient construction and environmentally responsible material selection.
A genuine differentiator as California's Title 24 energy standards continue to tighten.
Why this rank: The clearest specialist on this list for homeowners whose priority is energy performance and sustainable materials.
7
One Week Bath
Best for fast single-bathroom remodels
Narrowly focused on bathroom remodeling with a compressed, highly systematized construction schedule.
Consistently the most visible name in Los Angeles for bathroom-only searches.
Why this rank: If your project is one bathroom and speed is the deciding factor, a dedicated bathroom specialist will usually beat a generalist on schedule.
8
MDM Custom Remodeling
Best review depth on Yelp
4.9 stars across roughly 200 Yelp reviews, family-owned and locally operated with a verified license badge.
Covers complete home remodeling, new additions, ADU construction and kitchen remodeling.
Why this rank: One of the most heavily and consistently reviewed remodelers in the city, which matters if third-party review volume is your main signal of trust.
9
MDRN Construction
Best for in-house licensed trades
Burbank-based, serving Burbank and the surrounding area, with verified license and certified-professional badges and free estimates.
Uses its own licensed contractors for electrical and plumbing rather than subcontracting those trades out.
Whole-home renovations, kitchen and bathroom remodels, custom cabinets, flooring, additions and ADUs.
Why this rank: Keeping electrical and plumbing in-house reduces scheduling friction on the trades that most often hold up an inspection.
10
Supreme Remodeling
Best for budget-conscious ADUs
Family-owned and based in Sherman Oaks, focused on kitchens, baths, ADUs and full-home work.
Positions itself around affordable, well-managed projects rather than high-end custom work.
Why this rank: A practical option when the ADU budget is tight and the scope is straightforward.
How to Vet Any LA Contractor
Use this regardless of who you hire, including us. Every item is something a legitimate contractor will hand over without hesitating.
Verify the CSLB license yourself at cslb.ca.gov: active status, matching classification, workers' compensation and liability on file.
Ask for three recent, comparable Los Angeles projects and actually call the homeowners.
Get three bids on identical scope, with named material allowances so the numbers are comparable.
Confirm who pulls the permits, and that plan check fees are billed at cost with no markup.
Require a written fixed-price contract with milestone-based payments before any money changes hands.
Read reviews for patterns across independent platforms, not just the testimonials on the company's own site.
On a pre-1978 home, confirm EPA Lead-Safe certification before anyone disturbs painted surfaces.
FREQUENTLY ASKED QUESTIONS
How do I verify a Los Angeles contractor's license before signing?
Look the license number up directly in the California State License Board database at cslb.ca.gov. Confirm three things: that the license is active, that the classification matches your project (a Class B General Building Contractor can run a multi-trade remodel), and that both workers' compensation and general liability coverage are on file. Do this yourself rather than accepting a screenshot. 1 Smart Build holds CSLB license #1076428, Class B.
Why does remodeling cost more in Los Angeles than the national average?
LA residential construction generally runs 15 to 25 percent above the national average. The drivers are local labor rates, the strictest residential energy code in the country in Title 24, California seismic and structural requirements, and LADBS permitting complexity. Standard plan check typically runs 15 to 25 business days, with express review of 5 to 10 days available on smaller projects. Older housing stock adds cost too, which is why we recommend a 10 to 15 percent contingency on pre-1970 homes.
How many contractors should I get bids from?
Three is the practical number. Fewer and you have no basis for comparison; more and the process stalls. The important part is comparing them on equal footing: identical scope, comparable material allowances, and a payment schedule tied to completed milestones rather than calendar dates. A bid that is dramatically lower than the other two is usually missing scope that will return later as a change order.
Should I hire a specialist or a general contractor?
If your project is a single room with no structural or layout change, a specialist can be faster. Once the project touches structure, involves more than two trades, changes the footprint, or needs engineered plans and plan check, a general building contractor is the better choice because one party is accountable for sequencing, inspections and the result.
What should a written contract include before work starts?
A fixed price with the scope spelled out, a payment schedule tied to completed milestones, named material allowances, who pulls and pays for permits, how hidden conditions get priced, an estimated schedule, and a written warranty. Permit and plan check fees should be billed at cost. Never begin work on a verbal agreement or a one-page estimate, and be cautious of any large deposit requested before permits are in hand.
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