Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Koreatown
Adding square footage to a home in Koreatown is not a simple bolt-on job. A room addition or ADU on a 90005 lot means working around party walls, occupied units, and a building stock that runs heavily to pre-1978 wood-frame construction. In real numbers, a Home Additions & ADU project in Koreatown typically runs $45,000-$130,000 for a room addition and $90,000-$220,000 for a detached ADU, and the schedule is driven more by long-lead materials and seismic sequencing than by how many guys you put on the job. Barrett & Sons Construction has been answering the phone for 29 years, and when you call (877) 610-1318, you reach a live person who knows Koreatown’s buildings, not a call center out of state.
Why Barrett & Sons Construction Is Koreatown’s Preferred Home Additions & ADU Company
Tom Barrett founded this company in 1998, and his sons run the crews. When we work in Koreatown, Tom’s name, address, and license number are published and verifiable before you ever sign a contract. Ask anyone on your street or look up the license number yourself. We are not a franchise dispatching strangers from three counties away.
Koreatown’s housing stock rewards a contractor who has worked the neighborhood’s mid-century stucco walk-ups and Spanish Colonial Revival apartment buildings. We know that a second-story addition near Wilshire and Western often means coordinating with a soft-story retrofit already under city deadline, and that phasing work around tenants who cannot be displaced is not a courtesy. It is the job. Every project we run in Koreatown includes permits pulled and inspections signed, every price change arrives as a written change order before a single nail moves, and every completed job carries our 90-Day Done Right Promise in writing.
Our crew members are background-checked and uniformed on every visit. A live person answers the phone 24 hours a day, 7 days a week. If something is not right, Tom comes back and makes it right, one call.
Our Home Additions & ADU Services in Koreatown
ADU Design & Permitting
Getting an ADU through the City of Los Angeles means plans that reflect Koreatown’s actual conditions: density, lot coverage limits, and the retrofit obligations that attach to older multi-family parcels. We handle the design and the permit package as one scope, so the project does not stall between an architect who drew something pretty and a builder who says it cannot be built for what was quoted. Every allowance that is not on paper is a surprise waiting for a date. We put the allowances in writing before we submit.
Garage Conversion ADU
A garage conversion in Koreatown typically runs $30,000-$80,000, but the number that matters more is whether the garage sits under a tuck-under carport in a soft-story building. If it does, the seismic retrofit sequence affects your garage conversion, and missing that coordination is how you get a stop-work order and double mobilization. We have converted garages on dense blocks near Olympic and Vermont where staging materials meant sequencing deliveries by the hour, not the day. That is not a suburban timeline, and we do not pretend it is.
New Detached ADU
A new detached ADU on a Koreatown lot is a $90,000-$220,000 project, and the honest truth is that the long-lead items set the calendar. Custom millwork, architectural glass, Cambria slabs, Euro-style shower systems. Labor does not drive the schedule on this tier. Materials do. We price those line items in writing before we order anything, which is why our fixed price stays fixed. Our scope of work allocates slab and cabinetry allowances in the draw schedule before the first rough-in, not after a designer realizes the lead time slipped.
Junior ADU & Interior Conversion
A Junior ADU inside an existing Koreatown apartment unit is often the most practical way to add rentable square footage without the structural and sequencing complications of a detached build. Many of these units can be created within an existing bedroom or converted interior space, with a kitchenette, a separate entrance, and the plumbing already run. We coordinate with the building’s existing systems so the work does not disturb the units above and below. For a landlord in a fully occupied 90005 building, that phasing is the difference between a completed JADU and a tenant exodus.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Koreatown
We install materials you can look up, not mystery brands off a van. In Koreatown ADU and room addition work, that means KraftMaid and Cambria in the kitchen and wet bar, Kohler fixtures in the bath, Andersen windows on the upper-floor expansion, and Belgard or Techo-Bloc on any hardscape tied into the addition. When a Koreatown customer wants a stone product, we quote Techo-Bloc and Cambridge Pavers by name and line item. You know exactly what you are paying for, and the lead time for each product is written into the schedule before we order. That is how a fixed price stays fixed.
Common Home Additions & ADU Problems We See in Koreatown Homes
- Soft-story retrofit sequencing gone wrong. An owner adds a second-story ADU over a tuck-under carport without coordinating the city-mandated steel moment-frame retrofit, and the inspector shuts the job down. We price the seismic scope into the addition from day one because in Koreatown, the two are inseparable.
- Long-lead allowances that were never written down. Custom millwork and architectural glass have real lead times, and slab overruns are foreseeable from the design phase. Yet we routinely see owners handed change orders for cabinet and countertop costs that should have been in the original scope.
- Party-wall access and tenant dust control ignored. In Koreatown’s fully occupied walk-ups, you cannot demo a shared wall at noon and expect the building to stay livable. Phased access, negative air pressure, and scheduled rough-ins around tenant hours are the baseline, not the upgrade.
- Suburban timelines applied to a dense-block build. Koreatown’s 2-to-4-story buildings on some of the densest residential blocks in the United States mean material staging, dumpster placement, and crane or lift access all need advance sequencing. A contractor who treats a 90005 lot like a Hancock Park single-family parcel will blow the schedule.
Pricing for Home Additions & ADU in Koreatown, CA
| Scope | Koreatown Price Range |
|---|---|
| ADU Construction | $90,000-$220,000 |
| Home Addition | $45,000-$130,000 |
| Garage Conversion | $30,000-$80,000 |
| Kitchen Remodel | $14,000-$45,000 |
| Bathroom Remodel | $9,000-$28,000 |
| Countertop Installation | $2,000-$6,500 |
| Cabinet Installation | $4,000-$13,000 |
We give you a written, line-item estimate before any work begins. When a price changes, it changes on paper first, with your signature, before we order or install anything. That is the whole point of a fixed price. Call (877) 610-1318 and we will schedule the free estimate.
We Also Serve Cities Near Koreatown
Our crews work throughout the surrounding area: Los Angeles, Echo Park, Silver Lake, and Hollywood. If you own a building in Koreatown and an investment property one neighborhood over, you get the same written scopes, permits pulled, and 90-Day Done Right Promise on both. One contractor, one name to call, one paper trail.
Serving Koreatown, CA - Our Local Coverage Area
We’re based in the Koreatown area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Koreatown
Does LA’s soft-story retrofit ordinance affect my ADU project if my Koreatown building is already compliant?
No, if your building has already received its soft-story retrofit sign-off under Ordinance 183893, that compliance does not add new structural work to your ADU scope, but it does change how we sequence the job. We can start the addition without phasing around a retrofit deadline, which shortens mobilization and lets us schedule demolition uninterrupted. If compliance is pending, we coordinate the two scopes from the first day, because adding an ADU over a tuck-under carport in a building that is not yet compliant will trigger a stop-work order. Call (877) 610-1318 and we will check your building’s retrofit status when we come out for the estimate.
How do you handle dust and noise when adding an ADU to an occupied Koreatown apartment building?
We phase the work. Demolition and rough-in get confined to defined hours, negative air pressure and zip-wall containment isolate the occupied units, and material staging is scheduled around tenant access rather than the other way around. In Koreatown’s fully occupied walk-ups, that is not a courtesy, it is a requirement. We put the dust-control and access plan in the written scope before we start, so tenants and owners both know what to expect.
What long-lead items actually drive the schedule for a high-end ADU in 90005?
Custom cabinetry, architectural glass, stone slabs, and specialty plumbing fixtures drive the schedule, not labor. A Cambria slab order or a KraftMaid custom cabinet run can take eight to twelve weeks, and if those allowances are not ordered at the start of the design phase, the whole project stalls mid-rough-in. We price every long-lead item into the draw schedule before the first nail moves, which is how our inspections sign off on time and the price stays what we quoted.
Can I build a Junior ADU inside my existing Koreatown apartment unit without major structural work?
Often, yes. A Junior ADU inside an existing unit can be created by converting interior space, adding a kitchenette and a separate entrance, without new foundation or structural changes, provided the building has the plumbing and electrical capacity. The work runs through the existing systems, so the surrounding units stay undisturbed. We will confirm what your specific building allows and bring the permit package in one scope.
Why is a fixed price in writing so important for a Koreatown room addition?
Because Koreatown’s soft-story retrofit queue, party-wall density, and occupied-building phasing introduce moving pieces that a vague estimate cannot account for. An allowance that is not on paper is a surprise waiting for a date. When Tom Barrett scopes a room addition, every allowance, every change order, and every long-lead item is written down and signed before work proceeds. If something changes mid-job, you see the number in writing before we act. That is how a five-figure project ends with the price you agreed to, not the price a national outfit would “discover” at the end. Call (877) 610-1318 for an exact quote, estimates are free.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Koreatown since 1998.