A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Room Addition Contractor Across Hollywood
Adding a room to a Hollywood home usually costs between $220 and $410 per square foot for site-built work, so a 400 sq ft primary suite or in-law suite lands in the $88,000 to $164,000 range before finishes. That’s the honest ballpark we give homeowners on the first call, because you should know the number before anyone asks you to sign anything. We’re Benson ADU Builders, and our crews work Hollywood weekly, from the flats south of Melrose up through the hills above Franklin Ave. Call (903) 568-7222 for a written, line-item price before any work starts.
Why Benson ADU Builders Is Hollywood’s Preferred Room Addition Contractor Company
Most of the Hollywood additions we scope are on homes built before 1940. That changes everything about how the job gets priced and permitted, and it’s why homeowners here tend to call us after a more generic contractor hands them a number that falls apart at plan check. We know the LADBS Hollywood district office, we know which prewar bungalows likely need seismic strengthening before new walls can legally tie in, and we put all of that in the written price up front.
Troy Eastman leads our team, and he’s built a reputation in Hollywood for showing up with a written price, a real schedule, and a crew in uniform. Homeowners from Beachwood Canyon to Whitley Heights consistently tell us the same thing: the estimate matched the final invoice. That’s the Relay Visibility Guarantee working as designed, backed by our 365-Day Done Right Promise on every project.
We coordinate scheduling and dispatch from the brand’s Los Angeles office, so Hollywood homeowners get a dedicated project manager who responds the same day, not a voicemail loop. You’ll get before-and-after photos, a digital invoice you can pay by link, and a live person on the phone whenever you call.
Home Addition Plans in Hollywood
Home Addition Plans in Hollywood have to clear a specific set of hurdles that don’t exist in most other corners of the county. Your project starts with a site survey and existing-condition drawings, then moves into architectural and structural plans that must pass LADBS plan check. On a prewar bungalow, that structural set typically includes foundation bolting details, shear-wall schedules, and often a seismic retrofit scope tied directly to the addition. We handle all of that in-house, from Title 24 energy calculations to the final permit-ready set.
Seismic and Structural Scope
If your Hollywood home is single-wall or balloon-frame construction, the City of Los Angeles will not let you add new square footage without first proving the existing structure can take the load. That means hold-downs, foundation anchors, and sometimes cripple-wall bracing, specified in the structural drawings before plan check. We price this work into the estimate from day one, so it doesn’t become a surprise change order mid-framing.
Title 24 and Energy Compliance
Every conditioned room addition in Hollywood must meet California Title 24 energy standards, and that requires a separate compliance report submitted with your permit package. We run the calculations, spec the insulation and glazing to pass, and coordinate any required HERS verification after the walls are up. One less thing for you to chase.
In Law Suite Builders in Hollywood
In Law Suite Builders in Hollywood operate under a specific set of realities: many homeowners want to add a private suite for aging parents or adult kids, not just a spare room. A true in-law suite includes a separate entrance, a small kitchenette or full kitchen, and its own bath, which means plumbing, electrical, and often a second egress requirement. In Hollywood’s housing stock, that typically means working with prewar footprints and 5,000 to 7,000 sq ft lots where every inch of setback counts.
Attached vs Detached Suites
Attached in-law suites fall under the same building permit as the addition itself, while a detached suite is a separate structure and gets classified closer to an ADU. In Hollywood, attached suites are usually faster to permit because they tie directly into your existing home’s systems. Detached suites give more privacy but require their own foundation, utility trenching, and often a longer plan-check timeline.
Kitchenette and Egress Requirements
A legal in-law suite in Hollywood needs a second means of egress, proper ventilation for the kitchen area, and a bath that meets current accessibility and plumbing codes. We draw these details into the plan set from the start and confirm them with LADBS before you spend a dollar on fixtures. No surprises at the final inspection.
Trusted Brands We Service in Hollywood
Benson ADU Builders is an authorized builder for Abodu and Cover prefab systems, and we work regularly with Dvele panelized products for Hollywood homeowners who want a faster build and factory-controlled quality. When you choose a prefab addition, the wall panels and roof systems arrive pre-engineered, which cuts framing time significantly compared to site-built work. We stock compatible components and coordinate directly with the manufacturer on any warranty-related replacement for Hollywood projects. You get a real brand name behind the materials, not a mystery supplier.
Common Room Addition Contractor Problems We See in Hollywood Homes
- Unreinforced foundations on prewar bungalows. Many Hollywood homes from the 1920s and 1930s sit on foundations that were never bolted to the framing, and LADBS will not sign off on an addition until that connection is brought up to code. This is the single most common budget-killer we see, and it’s knowable before you ever pull a permit.
- Hillside and grading triggers north of Franklin Ave. Lots on the slope side of Hollywood often require a geotech report and grading review as part of the permit set, and that takes time and money. We map this into the schedule before plan check, so you’re not waiting three extra weeks with a red-tagged project.
- Wishful thinking on plan-check timelines. LADBS plan check for a room addition in Hollywood typically runs two to five months depending on complexity and whether corrections are needed. Contractors who promise walls up in 30 days are not being straight with you.
- Clay-tile roof blending. Homes around Whitley Ave and Franklin Ave frequently have original clay-tile roofs, and tying new framing into that profile requires careful flashing and, often, sourcing matching tiles. We plan for that in the initial estimate instead of discovering it after demo.
Pricing for Room Addition Contractor in Hollywood, CA
Site-built room additions in Hollywood run $220 to $410 per square foot, with prefab systems through Abodu or Cover typically landing on the lower-middle of that range because factory construction cuts on-site labor. An in-law suite with a full bath and kitchenette adds $45,000 to $85,000 over a basic bedroom addition due to plumbing and electrical density. Seismic retrofit work tied to your addition runs $8,000 to $25,000 depending on foundation condition, and a geotech report for hillside lots is usually $2,800 to $6,500. Every quote we give is written, line-itemed, and fixed before work starts. Call (903) 568-7222 for your free estimate.
We Also Serve Cities Near Hollywood
Our Room Addition Contractor team works throughout the greater Los Angeles basin, and we regularly serve homeowners in Los Angeles, Long Beach, Anaheim, and Riverside. If you’re just outside Hollywood and wondering whether we cover your street, call us; the answer is almost always yes.
Serving Hollywood, CA - Our Local Coverage Area
We’re based in the Hollywood 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 About Room Addition Contractor in Hollywood
If your Hollywood home was built before 1940 with single-wall or balloon-frame construction, then yes, LADBS will almost certainly require foundation bolting and shear strengthening as a condition of your addition permit. The exact scope depends on the existing sill plates, cripple walls, and foundation condition, but it’s knowable with an early structural walkthrough, and we price it into the written estimate before plan check. Want a definitive answer for your specific house? Call (903) 568-7222 and we’ll walk the property with you.
Plan check at LADBS Hollywood for a room addition typically runs two to five months, with hillside lots and projects over 500 sq ft leaning toward the longer end. The timeline depends on whether corrections are requested and how quickly your design team turns revisions around. We manage the entire plan-check process for you, including responding to LADBS comments, and we give you a realistic calendar in writing before the first submittal. Call (903) 568-7222 to get a project timeline started.
If your lot sits on a slope north of Franklin Avenue, or if your property is mapped in a hillside grading zone, LADBS will require a geotech report and a grading review before your addition permit can clear. That includes soil testing, slope-stability analysis, and often retaining-wall engineering, which adds two to six weeks to the pre-construction timeline and $2,800 to $6,500 to the budget. We identify this trigger on the first site walk and build the cost and schedule into the written price. Call (903) 568-7222 for a site evaluation.
The biggest cost drivers are foundation and seismic upgrades on prewar homes, hillside geotech requirements, plumbing and electrical density for bathrooms or kitchens, and the finish level you choose. Site-built additions in Hollywood land between $220 and $410 per square foot, and an in-law suite with a full bath and kitchenette starts around $45,000 over a basic room. We give you a written, line-item price that names every driver up front, so nothing changes at the door. Call (903) 568-7222 for a fixed quote.
Yes, and it’s one of the most common requests we get from Hollywood homeowners who need space for aging parents or adult kids. The suite gets its own entrance, bath, and kitchenette or full kitchen, designed and permitted as part of the same addition package. We handle the plumbing, electrical, ventilation, and egress requirements in the plan set, and we’ll help you decide whether an attached or detached configuration fits your lot. Call (903) 568-7222 to talk through the options, and we’ll put the numbers in writing.
Written by Troy Eastman, Owner at Benson ADU Builders, serving Hollywood, CA.
