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 Century City
When a homeowner in the 90067 ZIP calls us about adding square footage, they’re almost never working with a single-family house. Century City’s residential stock is high-rise luxury condominium living, which means adding an ADU here rarely means a backyard structure and almost always means a conversion within an existing tower footprint, a penthouse expansion, or a garage-to-suite transformation in a podium-level parking deck. A typical home addition in Century City runs $45,000 to $130,000, and a full ADU construction runs $90,000 to $220,000. Barrett & Sons Construction has spent nearly three decades on our Roofing in Century City and other projects, navigating the building-management rules, elevator scheduling, and concrete-and-steel party walls that define construction in this ZIP. Call (877) 610-1318 for a free estimate, and we’ll walk you through what’s actually possible in your building.
Why Barrett & Sons Construction Is Century City’s Preferred Home Additions & ADU Company
We’re not a franchise operation. Tom Barrett founded this company in 1998, and his sons run crews on-site most days. That matters in Century City, where the difference between a smooth project and a stalled one is a contractor who has worked with The Century, Park Place, and The Carlyle building management teams before. These buildings operate with elevator booking systems, HOA-governed work-hour windows, and shared-corridor dust containment rules that will eat a disorganized contractor alive.
We’ve spent 29 years earning a reputation in neighborhoods like this one, and the reviews from our Century City customers reflect something simple: we show up when we say we will, we put every scope change in writing before work proceeds, and we pull permits on every eligible job. A live person answers our phone 24/7, not a voicemail box and not an out-of-state call center. If you live in one of the towers off Avenue of the Stars or along Constellation Boulevard, ask your building manager about us. Or look up our license number yourself. Tom publishes his name, his address, and his license number because the last contractor most customers used told them permits were optional.
Our Home Additions & ADU Services in Century City
Most people searching for Home Additions & ADU in this ZIP are surprised by how much is possible inside a luxury high-rise. Here are the four services we handle most often for Century City residents.
ADU Design & Permitting
In Century City, ADU design almost never looks like a detached cottage. It looks like a reconfiguration of existing square footage, a penthouse expansion within the building’s envelope, or a podium-level conversion. We handle the design, the structural engineering, the HOA submittal package, and the city permitting. The permit inspector works for you, not for me, which is why I like him. Every scope, every allowance, every price change arrives as a written change order before work happens.
Garage Conversion ADU
Several Century City condominium buildings include deeded parking spaces in podium structures, and converting a portion of that space into a livable junior unit is a real option in some buildings. A garage conversion in this market typically runs $30,000 to $80,000. The concrete-and-steel context means we’re dealing with fire-rated separations, sound-transmission concerns through party walls, and building-management rules about where construction materials can stage. We coordinate the elevator bookings and the corridor protection before a single hammer swings.
New Detached ADU
Detached ADUs are rare in the 90067 ZIP because there is almost no detached single-family housing stock. But Century City sits adjacent to neighborhoods where detached structures exist, and we do build them when a property allows. A new detached ADU runs $90,000 to $220,000 in this market. What makes the Century City version different is the seismic reality. This area sits in a high-seismic zone, and any ground-up structure we build gets engineered to the same standards we’d apply to a tower retrofit.
Junior ADU & Interior Conversion
This is the workhorse service for Century City. A junior ADU, often 500 square feet or less, carved from existing floor area inside a condominium unit, trends toward the lower end of the home addition range, often starting around $45,000. We’ve done these in buildings along Century Park East and Century Park West. The hardest part is never the framing. It’s the sound transmission through concrete party walls and the building’s requirement that all work happen inside specific hours. We know those hours. We plan around them.
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 Century City
When we add a room or build an ADU in Century City, the Windows & Doors - Century City systems have to match what the building already uses, especially in the glass curtain-wall towers that define this ZIP. We install Simonton and Ply Gem windows on residential conversion work, and we specify PGT impact-rated glazing where the building envelope requires it. These are brands you can look up, not mystery products off a van. For Century City customers, that matters because your HOA will want documentation on every material we propose. We provide specifications in writing before installation begins.
Common Home Additions & ADU Problems We See in Century City Homes
- Sound transmission through concrete party walls. The luxury towers in Century City are concrete-and-steel structures. Without proper acoustic isolation between the new unit and the existing space, you’ll hear every conversation in the adjacent wing. We specify acoustic underlayments and wall assemblies that meet the building’s transmission standards.
- Elevator scheduling and material staging conflicts. In high-rise buildings like The Century and Park Place, there is no curbside drop-off for sheet goods. Everything moves through a freight elevator on a schedule controlled by building management. Contractors who don’t plan for this end up paying crew members to stand around. We book elevator times before materials arrive.
- HOA work-hour restrictions. Most Century City buildings allow construction noise only during weekday daytime windows, often 9 a.m. to 4 p.m. If a contractor ignores those windows, the HOA will shut the job down. We’ve been doing this long enough that we submit the work-hour plan with the initial proposal.
- HVAC and glazing overload from solar heat gain. The glass curtain-wall construction dominant across Century City’s towers drives significant solar heat gain, especially on west-facing units along Avenue of the Stars. When we add square footage, we often recommend upgrading window glazing and HVAC capacity as part of the same scope. It’s a real observation from actual jobs in this ZIP, not a generic warning.
Pricing for Home Additions & ADU in Century City, CA
A home addition in Century City runs $45,000 to $130,000 depending on square footage, structural work, and finish level. A full ADU construction runs $90,000 to $220,000. A garage conversion ADU runs $30,000 to $80,000. A junior ADU or interior conversion often starts around $45,000 and goes up depending on whether you’re moving plumbing, upgrading electrical service, or adding acoustic isolation. What affects the price in Century City more than anything else is the building itself. Concrete party walls cost more to penetrate safely. Elevator logistics add labor hours. HOA compliance adds documentation time. We will never hand you a price and then return with a surprise at the end. Every change order arrives in writing before work happens because an allowance that isn’t on paper is a surprise waiting for a date. Call (877) 610-1318 for a free estimate, and we’ll give you a line-item breakdown before you sign anything.
We Also Serve Cities Near Century City
While this page is for Century City homeowners, our crews also serve Beverly Hills, Culver City, West Hollywood, and Santa Monica. If your building sits near the border of any of those areas, call us and we’ll confirm coverage. And if you’re already planning an addition, ask us about Kitchen Remodeling in Century City or Bathroom Remodeling in Century City, since most addition projects touch at least one of those spaces along the way.
Serving Century City, CA - Our Local Coverage Area
We’re based in the Century City 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 Century City
We can typically schedule an initial consultation within a few days for Century City residents, and depending on your building’s HOA review calendar and city permitting, work often starts within four to eight weeks. Call (877) 610-1318 and we’ll tell you where we can fit your project into our schedule.
Yes, we’ve worked in buildings across the 90067 ZIP, including high-rise condominiums along Avenue of the Stars, Constellation Boulevard, and Century Park East. Some buildings have stricter work-hour rules than others, but we coordinate with management directly. If you’re in a building we haven’t worked in yet, the process is the same: we review the HOA construction guidelines, submit the required documentation, and schedule around the building’s elevator calendar.
Yes, generally. Construction in Century City costs more than in Beverly Hills, Culver City, or West Hollywood because of elevator logistics, concrete party-wall penetrations, and HOA compliance work that doesn’t exist on a single-family lot. A percentage of the project cost goes directly to building-specific coordination. But the investment holds value here because addable square footage in this ZIP is rare and expensive per square foot. Call (877) 610-1318 for a written estimate with specific numbers for your building.
Every project comes with our 90-Day Done Right Promise, written on the contract. If something isn’t done right, one call brings Tom Barrett back to make it right. We also run the standard manufacturer warranties on the materials we install, like Simonton and Ply Gem windows. For a project of this size, you want all of that in writing before work starts, and we provide it.
Yes. We’ve handled HOA submittals for several towers in the 90067 ZIP, including the architectural review packages and the work-hour plans most Century City buildings require. We’ll also pull city permits and schedule inspections on every eligible job. The permit inspector works for you, not for me, and I like it that way.
Call Barrett & Sons Construction for Your Century City Home Addition or ADU
If you own a condominium in The Century, Park Place, The Carlyle, or any of the other luxury towers in the 90067 ZIP, and you’re thinking about adding space, call us. We’ll walk you through what your building allows, what the permitting will require, and what it’ll cost, in writing. A live person answers the phone 24/7. Call (877) 610-1318 to schedule your free estimate.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Century City and surrounding communities since 1998.