How to Compare ADU Builders in Los Angeles

This website is independent. It may introduce an owner to a company if a referral path is open. It does not employ that company or promise that it has space for the job. The owner must still check the company and quote.

Step 1: define the same project

Ask each bidder to price the same dated plans, finish list and site facts. If the design is not ready, compare early planning work in a set format. Do not call early allowances a fixed build price.

The brief should state the ADU type, rough size and permit office. Add site access, known utilities, demolition and the assumed foundation. Include building systems, finishes, appliances, outside work and items bought by the owner.

Step 2: find the contracting entity

Record the exact legal name that will sign the contract. State how the salesperson is tied to that business. List any design or trade firms. Search the CSLB license-check service and compare the record with the quote.

CSLB advises checking the status, identity and license type. Check workers’ compensation details and the rest of the public record. Save a dated copy and check again before signing, since status can change.

Do not rely on a logo, marketplace profile or someone else’s license number.

Step 3: request relevant project proof

Ask for recent ADU work similar in type, city or county and site difficulty. A garage conversion is weak proof for a hillside detached build. A finished kitchen photo does not demonstrate foundations, drainage or permit planning.

With permission, ask references about changes, communication and site cleanup. Ask how the company handled schedule updates, inspection fixes and final approval. Confirm that the same legal business and team completed the work shown.

Step 4: normalize the quote

Create rows for the items below.

• early site checks, survey and site verification;
• architecture, engineering and energy documents;
• permit administration and government charges;
• demolition, protection, access and hauling;
• grading, drainage and foundation;
• framing, envelope, doors and windows;
• building services, equipment and off-site utility work;
• cabinets, counters, tile, flooring and paint;
• fixtures, appliances and allowances;
• paths, fencing, landscape and repairs after the work;
• inspections, testing, cleaning and final approval; and
• exclusions, extra budget for surprises and owner work.

Mark each row fixed, allowance, excluded, unknown or owner-supplied. A blank row is not included merely because the quote says “turnkey.”

CSLB’s consumer guidance explains how to seek and compare written quotes using matching drawings, specifications and work. This site itself requests one introduction.

Step 5: compare the design and permit role

Design-build, architect-led and build-only firms split duties in different ways. Ask who signs plans and speaks with public offices. State how many rounds of corrections are included. Name who pays if an owner change needs new design work.

If a standard or prefab plan is planned, confirm program status and site-specific work. “Pre-approved” does not settle whether the design fits the address.

Step 6: compare schedule evidence

Ask about the company’s current design and build workload. Get the event that starts the job and a list of owner choices. Add utility assumptions and a project schedule. Separate time controlled by the company from waits for public offices, utilities or products.

References should confirm how the company communicates delays, not merely whether a project finished eventually.

Step 7: read the contract, not the sales summary

CSLB’s home-improvement contract page says jobs over $500 need a written contract. It covers work, materials, payments, permits and change orders. Under the usual rule, the first payment cannot be more than $1,000 or 10% of the total. The lower amount controls. Check current rules and get legal advice if needed.

Check insurance, legal risk terms, site protection, work hours and cleanup. Review dispute terms, warranty, exit rights, lien releases and final records. Do not sign a contract with blank spaces or missing attachments.

Step 8: score fit, certainty and communication

A simple scorecard can cover the checks below.

1. verified entity and credentials;
2. relevant completed work;
3. site and utility understanding;
4. work completeness;
5. allowance and exclusion clarity;
6. realistic schedule and capacity;
7. contract and payment clarity; and
8. quality of questions, records and communication.

Add price to the scorecard only after each quote covers the same work. A company that finds a real site risk may look more costly. Another bidder may have ignored that risk.

Transfer every quote into the groups in the Los Angeles, California ADU cost guide. This shows whether a gap comes from price, finish level, an allowance or missing work.

Questions worth asking in the first meeting

• What facts must be confirmed before you will fix the price?
• Which work will be performed by your company and which by others?
• Who owns and can use the design documents?
• What utility work is assumed?
• Which five items most often become changes on similar jobs?
• How are allowances selected and reconciled?
• What project will the planned supervisor manage at the same time?
• What do I receive at final approval?

Good companies should ask the owner detailed questions too.