A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Home Addition Contractor Across North Hollywood
Adding a bedroom over your garage or building a sunroom off the back of a 1940s bungalow in North Hollywood means navigating a specific set of local rules: fire-zone wall assemblies, county-versus-city permitting, and clay soil that behaves differently than it does three miles south. Seedling ADU Los Angeles handles these details every week. We’re a Home Addition Contractor that writes your full price before any work begins, keeps the jobsite clean enough for kids and pets, and backs every completed addition with a 365-Day Done Right Promise. If you’re planning a room addition on a lot near Whitsett Avenue or a sunroom off a 1950s ranch home, call (213) 449-7136 to set up a free estimate.
Why Seedling ADU Los Angeles Is North Hollywood’s Preferred Home Addition Contractor Company
North Hollywood homeowners keep telling us the same thing: they want a written price before the crew ever picks up a hammer, and they want the house left clean at the end of every workday. We deliver both. Ben Ortega leads our North Hollywood additions from scoping through final inspection, and every job gets a line-item quote up front. No change orders appear after the crew arrives. If something needs to be added, we price it in writing before we touch it.
Our crews roll into North Hollywood with shoe covers, drop cloths, and a clear plan for where materials go. We photograph the clean-up before we leave each day. That’s the Cedarwell Care Promise, and it applies to every addition we build in NoHo, from a 200 sq ft bump-out to a full second-story addition over an existing structure. Families with dogs and toddlers don’t have to wonder who’s walking through the gate. Our technicians are background-checked and uniformed, and a live person answers the phone when you call, whether it’s noon or 2 a.m. during an active build.
Bedroom Addition Contractor in North Hollywood
A Bedroom Addition Contractor in North Hollywood has to know what the city of Los Angeles will actually approve on a 6,000 sq ft lot, and what the county will require if the property sits on an unincorporated private street. Most bedroom additions here fall into one of three categories: an over-the-garage suite, a ground-floor bump-out off the back of a bungalow, or a partial second story. Each one triggers different setbacks, fire ratings, and foundation work, and the price difference is real.
Over-Garage Bedroom Suites
North Hollywood’s older detached garages often cannot carry the weight of a second-story bedroom without reinforcement. We core-test the soil and check the existing footing before we quote. If the addition lands within 5 feet of a property line, the exterior walls need one-hour fire-rated assemblies, a code requirement that adds $8,000 – $15,000 to a typical room-over-garage project here.
Ground-Floor Bedroom Additions
These work well on flat lots along the B Line corridor, where many 1920s homes have small interior footprints but usable side or rear yard space. A 300 sq ft ground-floor bedroom addition in North Hollywood typically runs $85,000 – $140,000 depending on foundation depth, plumbing connections, and whether we’re adding a bathroom to the scope. We keep the existing driveway intact whenever possible and plan deliveries so they don’t block the alley.
Sunroom Addition in North Hollywood
A Sunroom Addition in North Hollywood only makes sense if it’s designed for the Valley’s actual summer, not a coastal fantasy. Rooms that face south or west without a cool-roof membrane turn into 110°F glass boxes by July. We spec high-efficiency glazing and insulated roof panels on every sunroom we build in NoHo, and we run a thermal analysis before we quote so you know what the room will feel like in August, not just in February.
Three-Season Sunrooms Off the Rear Wall
The most common request we get on 5,000 – 7,500 sq ft North Hollywood lots is a 200 – 300 sq ft sunroom attached to the back wall of the original house. Foundation work on flat terrain is usually straightforward slab-on-grade, but clay-heavy soil on older 1920s lots can heave and crack a slab if we skip the core testing. Typical cost: $55,000 – $95,000 built-in place, or less if we integrate a prefab panel system from Cover or Dvele.
Acreage Sunrooms on Larger NoHo Parcels
Some North Hollywood properties, especially those on the edges of the neighborhood near the LA River channel, sit on larger lots with room for a detached sunroom or studio. Those projects require their own foundation, separate electrical runs, and often county permits. We scope them from property line to property line, including grading and drainage, before we hand over a written price.
Trusted Brands We Service in North Hollywood
We work with prefab and modular brands that North Hollywood homeowners already know: Abodu for turnkey backyard units, Cover for panelized construction that speeds up a sunroom or bump-out, and James Hardie for fiber-cement siding that holds up under NoHo’s intense sun and the fire-zone exterior wall requirements. We stock the most common James Hardie profiles and trim locally, and when a homeowner chooses a Dvele or Boxabl module on an acreage lot, we coordinate the delivery route and crane access with LA County permitting from day one. Having access to these brands means you choose what fits your lot and budget, not just what a builder prefers to sell.
Common Home Addition Contractor Problems We See in North Hollywood Homes
- Fire-zone wall surprises. North Hollywood sits in a Very High Fire Hazard Severity Zone. Any addition wall within 5 feet of a property line needs one-hour fire-rated exterior assemblies. Most first-time builders don’t know this until the inspector flags it, and it costs $8,000 – $15,000 to correct after framing starts.
- Clay soil and cracked slabs. Older 1920s lots near Victory Boulevard and Lankershim tend to have clay-heavy soil that shifts with moisture. We core-test before any slab pour so a new sunroom or bedroom doesn’t develop cracks a year after move-in.
- County versus city permits. Some North Hollywood addresses sit on unincorporated LA County parcels where the rules differ from city of LA code. We verify the permitting authority before quoting so your timeline doesn’t get shredded mid-project.
- Garage separation requirements. A bedroom over a detached garage requires a full fire-rated separation from the space below. That means specific drywall, insulation, and draft-stopping details, not just a floor assembly. We write these into the estimate from the start.
Pricing for Home Addition Contractor in North Hollywood, CA
Ground-floor bedroom additions in North Hollywood typically run $85,000 – $140,000. Sunroom additions range from $55,000 – $95,000 for a standard rear-wall build. Over-garage bedrooms usually land between $110,000 – $180,000 once fire-rated walls and structural reinforcement are included. Second-story additions start around $150,000 and climb from there depending on roofline and stairwell integration.
What moves the price: soil conditions, property-line setbacks, whether the parcel is city or county, and material delivery access on narrow alleys. We provide line-item pricing up front, in writing, before any work begins. Call (213) 449-7136 for a free estimate on your North Hollywood addition.
We Also Serve Cities Near North Hollywood
Our crews cover Home Addition Contractor in North Hollywood work and the surrounding neighborhoods, including Studio City, Sun Valley, South Pasadena, and Marina del Rey. If you’re just west of the 170 or south of Burbank, call us to confirm coverage. We’ll tell you honestly whether your project falls within our service area and when we can get a crew to your street.
Serving North Hollywood, CA - Our Local Coverage Area
We’re based in the North 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 Home Addition Contractor in North Hollywood
Yes. North Hollywood is in a Very High Fire Hazard Severity Zone, so a bedroom over a detached garage requires a one-hour fire-rated separation between the living space and the garage below, plus fire-rated exterior walls if they sit within 5 feet of a property line. The garage below also needs to meet current structural and electrical standards once it becomes part of the habitable envelope. Call (213) 449-7136 and we’ll walk you through exactly what applies to your lot.
Usually yes. The addition goes behind or beside the original home footprint, and we keep your driveway and alley clear as required by LA code for garage and parking access. On lots with narrow side yards near Laurel Canyon Boulevard or Magnolia, we may need to shift the addition or change the roofline. We scope this before quoting so you know the footprint will fit your lot, driveway, and rear alley all at once.
It depends on the address. Most North Hollywood properties fall under city of LA jurisdiction and pull building permits through the Los Angeles Department of Building and Safety. But some parcels, especially on private unincorporated streets, fall under LA County. A project on an unincorporated street typically needs county approval for structure, septic, and grading. We verify this in the first site visit and factor the correct permitting path into your written price.
For most flat NoHo lots, a slab-on-grade foundation is standard and cost-effective, but we core-test the soil first because clay-heavy earth on older 1920s properties can heave and crack a slab over time. If the soil is unstable, we recommend a perimeter footing with deeper piers. Either way, we add proper drainage so water doesn’t pool at the new wall. Call (213) 449-7136 for a site assessment and a foundation recommendation specific to your parcel.
We start by reading the lot’s natural fall and mapping where water currently drains during heavy rain. On open acreage, we grade away from both new structures and route downspouts and surface water into a designed swale or dry well, never toward a neighbor’s parcel or the existing septic field. On county parcels, the grading plan gets approved as part of the permit package before any earth moves. We scoped a project off Whitsett Avenue where the west wall of a 400 sq ft garage-top addition sat 3 feet from the rear property line – our crew framed it with one-hour fire-rated Type X gypsum on the exterior and installed a cool-roof membrane to cut the Valley’s summer heat gain, pulling permits through LA County since the property sits on a private unincorporated street with no sewer lateral to the city main. That’s the kind of detail we build into every written quote.
Written by Ben Ortega, Owner at Seedling ADU Los Angeles, serving North Hollywood with written pricing, clean jobsites, and a 365-Day Done Right Promise on every home addition.
