How to Choose the Right ADU Company in Los Angeles

How to Choose the Right ADU Company in Los Angeles

Choosing the right ADU company in Los Angeles comes down to one thing: how much the contractor puts in writing before you hand over a dime. A good company gives you a line-item price, a defined schedule, and a written guarantee. A bad one gives you a handshake and a vague number. If you’d rather skip the legwork, call (254) 602-5618 for a free estimate from Lodgewick ADU Builders.

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Getting three bids means nothing if all three bids are vague. A $180,000 quote and a $220,000 quote can cover completely different scopes. One might include drywall, insulation, and a new electrical panel. The other might leave those as “owner’s responsibility” buried on page four. You won’t find out until you’re mid-project, with a change order in hand and a headache that won’t quit. This guide gives you a scoring framework built around what separates good ADU companies from bad ones: what they commit to on paper.

The Written-Before-We-Start Test

Before you sign anything, ask the company to put the full scope in writing with dollar amounts attached to each line. If they hesitate, that’s your answer. In Los Angeles, where a garage conversion can run $150,000 to $220,000 and a detached ADU can push past $350,000, vague pricing is the single biggest red flag.

A legitimate ADU contract in Los Angeles should include:

• Site preparation costs – grading, demolition, tree removal, shoring if your lot slopes. Many LA hillside lots need retaining wall work that never appears in the initial quote.
• Foundation and structural work – especially for garage conversions, where the existing slab often needs to be reinforced or replaced to meet current seismic codes.
• Rough and finish plumbing – including the new sewer lateral connection, which in Los Angeles can require a separate permit and inspection through LA Sanitation.
• Electrical service and panel capacity – if your existing panel is 100 amps, adding an ADU often means upgrading to 200 amps, which can add $3,000 to $6,000.
• Insulation, drywall, and finishes – down to the paint color and baseboard style, so there’s no “upgrade” conversation later.
• Permits and plan check fees – LA’s Department of Building and Safety charges separate fees for plan check, permits, and inspections. Ask who pays for resubmittals if the city bounces the plans.

At Lodgewick, we follow what we call The Kingswell Way: say the price before the work, show up in the window given, leave the place cleaner than we found it, and put the guarantee in writing. That guarantee includes a free return visit if the work fails within the 365-day guarantee period. Not every company works this way. The ones that do will tell you without being asked.

Why ADU-Specific Experience Matters More Than General Contracting

Plenty of Los Angeles general contractors will tell you they can build an ADU. Many of them haven’t navigated the city’s specific zoning codes, which change depending on whether you’re in a single-family zone, a hillside overlay, or a neighborhood subject to specific plans. A general contractor who last pulled an ADU permit in 2019 is working with outdated assumptions.

Los Angeles has its own ADU ordinance that sits on top of state law. Key rules include:

• Setback requirements – ADUs generally need 4-foot rear and side setbacks, but the exact number shifts based on lot configuration and whether you’re converting an existing structure like a garage.
• SB 9 lot splits – a two-unit lot split creates an entirely different set of requirements than a traditional ADU permit.
• Coastal Commission jurisdiction – if you’re in Venice, Playa del Rey, or San Pedro, the California Coastal Commission adds another layer of review.
• Historic Preservation Overlay Zones – neighborhoods like Angelino Heights and Hancock Park have stricter design review that can add months to the process.

We work with ADU builders in Los Angeles who know these rules because they deal with them weekly. When you interview a company, ask how many ADU permits they’ve pulled in LA County in the last 24 months, and ask for addresses. You can verify their permit history through the LA Department of Building and Safety’s online portal.

How to Read a Company’s Permit Pull History in LA

Los Angeles County makes permit records public. Anyone can search the LADBS online portal by address or contractor name. This is the single best way to verify what a company says about its ADU experience. You can’t fake a permit number, and you can’t fake a final inspection sign-off.

Here’s what to look for:

1. Volume – a company that’s pulled 40 ADU permits in three years has learned lessons that a company with four permits hasn’t. They’ve hit the weird edge cases: the neighbor dispute over a 3-foot side setback in West Adams, the hillside retaining wall in Mount Washington, the sewer line that runs under the neighbor’s driveway in El Sereno.
2. Finaled permits vs. issued permits – a company can pull a permit, start work, and never finish. Look for permits marked “finaled.” That’s the difference between starting projects and completing them.
3. Time from permit to final – if a company’s permits sit open for 18 months, something’s wrong. Either they’re understaffed, they’re over-extended, or they’re having inspection failures.
4. Consistency of address types – if most of their permits are in one area of Los Angeles, they know that area’s inspectors. That’s valuable. An inspector in Long Beach looks for different things than an inspector in Sherman Oaks.

Russ Delmar, who leads Lodgewick ADU Builders, will walk you through our permit history if you ask. We’d rather have an informed client than a suspicious one. Transparency cuts both ways – you learn about us, and we learn whether you’re the kind of homeowner who reads the fine print. We like that kind of homeowner.

The Honesty Question: Why Projects Run Over Budget

Ask every company you interview: “What’s the most common reason your projects run over budget?” This one question reveals more than any review or reference.

A good answer sounds like this: “Mostly when the homeowner changes scope mid-project. You decide you want a tankless water heater instead of the tank we quoted, or you add a built-in desk after framing’s done. Those changes cost money. But we document every change in writing before we do the work, so you’re never surprised.”

A bad answer sounds like this: “Oh, we rarely go over budget.” That’s a lie. Even well-run construction projects in Los Angeles hit surprises: the soil’s worse than the soils report suggested, the existing electrical is a mess behind the drywall, or a supply chain delay pushes a window delivery from three weeks to six. A company that says it never goes over budget is either lying or padding its initial quote so heavily that overages are already built in.

We’ve seen this play out in real life. A homeowner in North Hollywood hired a contractor for a garage conversion at $160,000. Three months in, the project was at $240,000, and the contractor had stopped answering the phone. The problems: the original quote didn’t include the electrical panel upgrade, the sewer connection, or a single interior door. Each “surprise” came with a change order. The homeowner had no written guarantee, no schedule, and no leverage. That’s the project that shaped how we think about The Kingswell Guarantee.

Real Price Ranges for Los Angeles ADUs in 2024

Every homeowner deserves a real number before they call. Here’s what ADUs actually cost in Los Angeles right now. These are 2024 ranges, not 2019 numbers, and not national averages. Los Angeles labor, permitting, and site conditions are unique.

• Garage conversion ADU – $150,000 to $220,000. The structure already exists, which saves money, but electrical, plumbing, insulation, and seismic retrofitting add up. If the garage is detached and requires a new foundation pour, expect the higher end.
• Attached ADU (addition to existing home) – $180,000 to $280,000. These involve tying into existing rooflines, which is more complex than it sounds. Mismatched roofing, flashing failures, and awkward floor height transitions are common failure points.
• Detached new-construction ADU – $250,000 to $350,000 plus. A new build from the ground up, including foundation, framing, roofing, and all systems. Prefab options like Abodu or Plant Prefab can shorten the timeline, though they don’t eliminate on-site foundation and utility work.

Prefab brands have changed the math in Los Angeles. Abodu and Plant Prefab deliver partially built modules that cut framing time significantly. Tuff Shed is another brand we work with for simpler structures where local codes allow. And James Hardie siding holds up well in LA’s dry heat and Santa Ana winds. The right material depends on your lot, your budget, and the look you want. A good ADU company helps you match the material to the site, not the other way around.

When to call a pro: if you’re not sure whether your lot can support an ADU, whether your garage is structurally sound enough to convert, or whether your electrical panel has capacity, call before you spend money on plans. A one-hour site visit from an experienced ADU builder in Los Angeles answers more questions than a month of online research.

Related services in Los Angeles: if you’re weighing an ADU against an addition, read our home addition contractor in Los Angeles page for a comparison. And if a garage conversion is your path, our garage conversion contractor in Los Angeles page walks through the process step by step.

How to Score a Company in Ten Minutes

Here’s a simple scoring framework. Give each company one point for each “yes.”

1. Gave you a written price without being asked? (Yes = 1 point)
2. Put the scope of work in writing, with line items? (Yes = 1 point)
3. Named a defined arrival window, not “sometime next week”? (Yes = 1 point)
4. Has ADU permits in Los Angeles County that are finalized, not just issued? (Yes = 1 point)
5. Could name the last three ADU projects they completed, with addresses? (Yes = 1 point)
6. Offered a written guarantee that covers the work for a specific period? (Yes = 1 point)
7. Answered the over-budget question with specifics, not a brush-off? (Yes = 1 point)
8. Has a live person answer the phone when you call? (Yes = 1 point)
9. Worked with named brands like James Hardie, Abodu, or Plant Prefab, and can explain why they chose them? (Yes = 1 point)
10. Did not pressure you with urgency or discounts for signing today? (Yes = 1 point)

Score 8 or above: you’re probably in good hands. Score 5 to 7: ask more questions. Score below 5: walk away. This isn’t a ranking of personalities. It’s a measure of written commitments, verifiable history, and clear answers.

We use this framework ourselves when we evaluate the prefab manufacturers and material suppliers we recommend. Abodu and Plant Prefab both provide written specification sheets and nailed-down delivery schedules, which matters when a homeowner has a yard full of dirt and a deadline. Tuff Shed works for certain simple structures. James Hardie warranties are documented in writing. We don’t recommend brands that can’t put their promises on paper, because if they can’t, we can’t pass those promises to you.

The Bottom Line

Choosing the right ADU company in Los Angeles isn’t about finding the cheapest bid or the nicest salesperson. It’s about finding the company that writes things down: the scope, the price, the schedule, and the guarantee. Get that in writing, and you’re protected. Skip it, and you’re gambling with a six-figure project.

Lodgewick ADU Builders has been part of the Lodgewick ADU Builders home family since 2010. We build ADUs, garage conversions, and home additions throughout Los Angeles. Every project includes a written price before work begins, a defined arrival window, a clean job site, and the 365-Day Done Right Promise in writing – if it’s not done right, we come back and make it right. If you’re in Los Angeles and ready to start, call (254) 602-5618 for a free estimate. A live person answers, 24/7.

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