Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Home Additions & ADU Across Century City
Home additions and ADU work in Century City almost never means what it means ten minutes away. Here, you’re not adding a wing to a ranch house. You’re reconfiguring a luxury high-rise condo at The Century, Park Place, or The Carlyle, combining two adjacent units, or building out a junior ADU inside your existing floor plate. A full home addition in Century City typically runs $45,000-$130,000, and an ADU construction project lands between $90,000 and $220,000 depending on scope, building requirements, and material selections. Call Barrett & Sons Construction at (877) 610-1318 and we’ll walk you through the Century City-specific path from HOA architectural submittal to final inspection sign-off, so your project doesn’t stall halfway through on a committee calendar.
Why Barrett & Sons Construction Is Century City’s Preferred Home Additions & ADU Company
Tom Barrett founded this company in 1998, and he still puts his name, his address, and his license number on every contract. That matters more in Century City than almost anywhere else in Los Angeles, because the work here is unforgiving. High-rise condominium projects mean HOA architectural review committees, freight elevator reservations, shared-corridor dust containment, and concrete-and-steel party walls that don’t forgive sloppy demo work. Our Home Additions & ADU crews have worked inside buildings like The Carlyle and Park Place, and we know what those management offices require before the first wall comes down. A live person answers our phone 24 hours a day, seven days a week. When you call (877) 610-1318, you talk to someone who knows Century City, not a call center in another state.
We’re not a franchise dispatching strangers. Tom’s sons run the crews, and Tom is on-site most days. Every change order arrives in writing before work happens. Every permit gets pulled and every inspection gets signed, because the last contractor most of our Century City customers used told them permits were optional. Ask anyone in your building, or look up the license number yourself. We’d rather you verify us before you sign than wonder about us after.
Our Home Additions & ADU Services in Century City
Junior ADU & Interior Conversion
This is the bread-and-butter project for Century City condos. A junior ADU converts underused interior space, like a den, a walk-in closet, or an oversized hallway alcove, into a self-contained living unit with a wet bar or kitchenette, and sometimes a private entrance. At the Carlyle on Avenue of the Stars, our crew recently converted an unused den and adjacent closet into a junior ADU with a wet bar and murphy bed. We coordinated with building management to book the freight elevator for material delivery, installed acoustical underlayment beneath the new subfloor to meet the HOA’s sound-transmission requirements, and filed the architectural modification packet so the building’s design committee could approve the new wall finishes before our rough-in inspection. Junior ADU work in Century City requires both city permits and HOA architectural approval, and we file both.
Garage Conversion ADU
In Century City’s condo towers, a “garage conversion” usually means converting a deeded parking space or a storage-level room into living space when the building’s bylaws allow it, or converting a ground-floor unit’s attached private garage in one of the few townhome-style buildings in the 90067 ZIP. Garage conversion ADUs in Century City typically run $30,000-$80,000. The catch here is that many HOAs restrict or prohibit converting deeded parking, so the first step is a feasibility review against your building’s CC&Rs. We do that review before you spend a dime on drawings.
New Detached ADU
Detached ADUs are rare in Century City because there’s almost no land to build them on. The residential stock is almost exclusively luxury high-rise condominiums. Where a detached ADU does apply is for the handful of mid-century apartment buildings and the few townhome-style properties that have private yard space. A new detached ADU in Century City generally falls between $90,000 and $220,000, driven by seismic requirements, foundation work, and utility trenching. We’ll tell you honestly if your property can support one before you invest in design fees.
ADU Design & Permitting
This is where Century City projects live or die. We prepare the full submittal packet for both the City of Los Angeles and your building’s architectural review committee. That means drawings that match the building’s design guidelines on materials, colors, door swing direction, and finish specifications, plus structural calculations for concrete-and-steel buildings, and a schedule built around the committee’s meeting calendar. Most Century City architectural review committees meet monthly. Missing a submittal deadline by one day means a four-week delay. We file early and we file complete.
We also handle room additions and second-story additions where the building configuration allows, plus sunroom and enclosed patio work for ground-floor units with private outdoor space. If you’re not sure what your condo’s CC&Rs allow, call (877) 610-1318 and ask. The answer is never a guess.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Century City
When a Century City condo project calls for windows, doors, or glazing, we install materials from manufacturers you can look up. Simonton and Ply Gem windows hold up under the solar heat gain that pours through Century City’s glass curtain-wall towers. PGT impact-rated products make sense for high-floor units exposed to wind load at elevation. And for interior door packages and finish hardware, we spec brands the architectural committee will recognize rather than mystery materials off a van. We keep a local material staging plan for every Century City building we work in, so the freight elevator bookings match the delivery schedule, not the other way around.
Common Home Additions & ADU Problems We See in Century City Homes
- HOA architectural rejection on the first submittal. Most Century City buildings have strict rules on materials, colors, and even door swing direction. Drawings that don’t match the building’s architectural guidelines get rejected, and the permit clock resets. We prepare submittals that match the committee’s published standards before the first filing.
- Underestimating shared-corridor dust containment. Century City condos share hallways with neighbors behind every wall. A single missed freight elevator reservation can stall a crew for a day and trigger HOA fines. We book elevator windows before we schedule demo, and we contain dust at the unit door, not just inside the unit.
- Assuming a standard residential permit timeline. Century City’s architectural review committees often meet monthly. Without scheduling around that calendar, the demo work sits open for weeks. We sequence the permit path so demolition doesn’t start until approval is in hand.
- Sound transmission through concrete-and-steel party walls. Century City towers transmit impact noise through the structural frame, not just through the air. New subfloors, wall assemblies, and plumbing chases need acoustical isolation to meet HOA sound standards. We install acoustical underlayment and isolation details as standard practice, not as an upsell.
Pricing for Home Additions & ADU in Century City, CA
Century City is not a cheap place to build, and pretending otherwise doesn’t help anyone. High-rise condominium work carries costs that single-family-home work doesn’t: freight elevator booking fees, building-mandated insurance certificates, limited work-hour windows, and architectural committee submittal fees. Here’s what you should expect for this market:
| Project Type | Typical Century City Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
What moves the number: the building’s insurance requirements, whether structural work touches the concrete frame, the finish level your HOA’s design guidelines require, and the length of the elevator booking windows. Every scope item, every allowance, every price change arrives as a written change order before work happens. No surprise invoices at the end. Call (877) 610-1318 for a written, line-item estimate. The estimate is free, and it’s specific to your building.
We Also Serve Cities Near Century City
Our crews work throughout the Westside, including Century City, Beverly Hills, Culver City, West Hollywood, and Santa Monica. Each of those cities has its own permit office and its own quirks, but the same Barrett & Sons standards apply: permits pulled, change orders in writing, and Tom’s 90-Day Done Right Promise on every contract. If you’re in a neighboring city and weighing a home addition or ADU, call (877) 610-1318 and ask us about your specific building type.
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
Yes, you need both, and they run on two different calendars. The City of Los Angeles reviews the building code side: egress, plumbing, electrical, structural. Your building’s architectural review committee reviews the design side: materials, colors, finishes, door swing, and whether the work matches the building’s published guidelines. In Century City, the HOA approval often takes longer than the city permit, because committees meet monthly. We file both packets in parallel so neither one waits on the other. Call (877) 610-1318 and we’ll tell you exactly what your building’s committee requires before you spend money on drawings.
Through the freight elevator, booked in advance, during the building’s designated work-hour windows. Every Century City tower has its own freight elevator reservation system, and most require a certificate of insurance naming the HOA and management company before the first load goes up. We file that paperwork first, then book the elevator windows around our demo and delivery schedule. A missed reservation can stall a crew for a full day and trigger HOA fines, so we treat the booking like a permit: confirmed in writing before work starts. Call (877) 610-1318 to talk through your building’s specific rules.
In most Century City condo buildings, yes, but only if the original plumbing riser or a nearby wet wall can support the additional drain and vent run, and only if the building’s HOA allows in-unit laundry. Many older towers restrict washer/dryer installation because of shared drain stacks and sound transmission. We check the building’s CC&Rs and the existing plumbing layout before we promise you a laundry hookup. If your building allows it, we’ll pull the plumbing permit and coordinate the riser shutdown with building management.
Typically four to six weeks, sometimes eight if your committee meets only monthly and you miss a submittal deadline by a day. That’s the reality of Century City’s high-rise condo buildings. The city permit review runs on its own schedule, and the two don’t always line up. We build the architectural committee’s meeting calendar into the project schedule from day one, so demolition doesn’t start until the committee has signed off, and the work never sits half-finished waiting on a committee. Call (877) 610-1318 and we’ll give you a realistic timeline for your building.
It can, indirectly. LA’s mandatory non-ductile concrete retrofit ordinance (Ordinance 183893) applies to certain 1960s and 1970s concrete office towers, and several Century City buildings fall under it. If your condo building is one of the affected structures, any interior addition that touches the structural frame, like a unit combination or a second-story interior addition, may trigger additional structural review, column jacketing, or shear wall requirements as part of the permit. We check the building’s retrofit status before we scope the work, because it changes both the engineering and the cost. Call (877) 610-1318 and we’ll pull the records for your address.
Get a Free Estimate for Your Century City Home Addition or ADU
The fastest way to know what your Century City project will cost is to call us and talk through the specifics of your building. Tom Barrett’s sons run the crews. The permit inspector works for you, not for us, which is exactly why we like him. Every scope item is in writing. Every allowance is in writing. Every change order is in writing. And every completed job carries the 90-Day Done Right Promise: if it’s not done right, Tom comes back and makes it right, one call. Call Barrett & Sons Construction at (877) 610-1318 to schedule your free estimate. We’ll shake your hand, look at your floor plan, and tell you the truth about what’s possible in Century City.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Century City and the Westside since 1998.