Fast, Reliable Home Addition Contractor Across Van Nuys
Home additions in Van Nuys run $180 – $420 per square foot depending on scope, which means a 500 sq ft room addition typically lands between $90,000 and $210,000, and a garage-to-ADU conversion usually falls between $120,000 and $190,000. Those are real numbers we put in writing before a single tool is picked up. If you’re planning to add square footage to a Van Nuys home, call (707) 383-5338 for a free estimate with a line-item price you can actually plan around.
We know the tract homes here. The single-story stucco ranch houses built between 1945 and 1965, the flat 6,000 to 8,500 sq ft lots, the detached garages at the back end of the alley. Our crews work Van Nuys week in and week out, and Ben Ortega leads every project with one rule: the family inside the home should feel like we were never there, except for the new space we left behind.
Why Seedling ADU Builders Is Van Nuys’s Preferred Home Addition Contractor Company
Van Nuys homeowners keep calling us back because we treat the construction process like it matters as much as the finished room. Every project gets a written price before work begins. No surprise line items, no change orders that show up after the crew arrives. The number we quote is the number you pay, and the work is covered by our 365-Day Done Right Promise in writing. If something isn’t right, we make it right.
The Home Addition Contractor team we send into Van Nuys homes is background-checked and uniformed. Your kids and pets know exactly who’s walking through the door. Shoe covers go on at the entry. Drop cloths go down on the floors. We use pet-safe products wherever there’s a choice, and before the crew leaves for the day, we take a photo of the clean-up and send it to you. That’s the Cedarwell Care Promise, and it applies to every job in Van Nuys, no exceptions.
We also answer the phone like humans. A live person picks up 24/7 throughout your build. If you’re at work in Sherman Oaks and need to ask about the subpanel going into your garage addition near Hazeltine Avenue, you’ll get a person, not a voicemail tree.
Sunroom Addition in Van Nuys
A sunroom addition in Van Nuys is a specific kind of build, and the Valley heat decides almost everything about it. We’re adding a glazed, conditioned space off the back or side of a ranch house, but here the glass package, roof insulation, and HVAC sizing have to be designed for triple-digit summers. A poorly planned sunroom becomes an oven by 11 a.m. from May through October. Done right, a Van Nuys sunroom is a light-filled room you’ll actually use ten months of the year, and it runs roughly $130 – $260 per square foot depending on the glazing and foundation work.
Glazing That Handles Valley Heat
We spec low-E, double-pane insulated glass with a high solar heat gain coefficient on the north side and aggressive shading on the south and west sides. The goal is daylight without the heat load. We also size the mini-split for the room’s actual solar exposure, not a coastal rule of thumb.
Foundation and Drainage Considerations
Flat Van Nuys lots drain slowly after a heavy storm. We inspect the existing slab and soil before we ever pour, and on the 1945 – 1965 tract homes we almost always add a vapor barrier under the new pour. It’s a small line item that prevents damp floors and warped baseboards two winters later.
Room Addition Contractor in Van Nuys
As a room addition contractor working Van Nuys, we handle the whole job from foundation to paint: a new bedroom, a family room bump-out, a home office, or a second-story addition over an existing single-story ranch. Most Van Nuys room additions land between $150 and $420 per square foot. A straightforward 400 sq ft ground-floor addition typically runs $90,000 to $140,000, while a second story pushes higher because of the structural reinforcement and stairwell. Every price we give you is in writing before work starts.
Living Through the Build
We know you’re not moving out during construction. The crew sets up a contained work zone, seals off the rest of the house, and uses quiet tools during homework hours when we can. We coordinate with your schedule, not the other way around. Floors inside the living space stay covered, and the clean-up photo comes before we leave each day.
Matching the Existing Ranch Style
The post-WWII Van Nuys ranch has a rhythm to it: low-pitched roof, horizontal lines, stucco exterior. We match that language so the addition doesn’t read as a box glued to the side of the house. Standing seam metal, board-and-batten siding, and modern plate glass can look great, but only if the roof line and scale line up with the original structure. We pay attention to that.
Trusted Brands We Service in Van Nuys
We work hands-on with the brands serious Van Nuys ADU buyers research before calling anyone. That includes Cover, Dvele, and Mighty Buildings for prefab and modular ADU construction, plus James Hardie siding and trim for site-built additions. We stock local parts for Van Nuys customers, which means a warranty repair or material replacement doesn’t wait on a cross-country shipment. You choose the right product for your lot and your budget, not just what the builder prefers to sell.
Common Home Addition Contractor Problems We See in Van Nuys Homes
- Salt air eating the cheap fasteners: People assume Van Nuys is inland enough to skip marine-grade hardware. It’s not. The combination of salt-laden air pushed up from the coast and Valley heat corrodes electro-galvanized and zinc-plated fasteners in under five years. We see rusted hinges and bubbled paint on alley-facing garage doors all the time. We spec hot-dip galvanized or stainless hardware on every exterior connection.
- 100-amp panels that can’t handle the addition: The original 1945 – 1965 tract homes in Van Nuys almost always have a 100-amp electrical service. Adding an ADU subpanel without upgrading the main to 200 amps leads to nuisance tripping and failed inspections, especially when HVAC and EV charging are part of the plan. We catch this before we start, not after the inspector shows up.
- HVAC sized for the beach, not the Valley: A garage interior in Van Nuys hits 120°F in summer. That’s not an exaggeration. A 1-ton mini-split that works fine in a coastal ADU will struggle here. We size for the actual load: R-15 walls, radiant barriers, and typically a 2-ton mini-split for a 500 sq ft converted garage.
- Doors and windows that fail early: Single-pane aluminum sliders and builder-grade hollow-core steel doors don’t survive the heat-and-salt combination. We replace them with fiberglass multi-point doors, stainless thresholds, and insulated vinyl or thermally broken aluminum windows. The upgrade costs more upfront and pays for itself by not failing in year six.
Pricing for Home Addition Contractor in Van Nuys, CA
A room addition in Van Nuys runs $150 – $420 per square foot. A garage conversion to an ADU lands between $120,000 and $190,000 for a typical 400 – 500 sq ft detached structure. Sunrooms run $130 – $260 per square foot. Second-story additions push to the top of the range because of structural work. What moves the number most: foundation condition, electrical panel age, HVAC sizing for the Valley heat, and whether you need the coastal-spec fasteners and marine-grade finishes that actually last here. We give you a written line-item quote before any work starts, so you know exactly what you’re buying. Call (707) 383-5338 to schedule your free estimate.
We Also Serve Cities Near Van Nuys
Our crew works throughout the San Fernando Valley, so if you’re in Sherman Oaks, Studio City, North Hollywood, or Encino, the same Home Addition Contractor in Van Nuys team can handle your project. We know the different lot types and building patterns across these neighborhoods, and we bring the same written pricing and Cedarwell Care Promise to every job.
The Van Nuys Alley Advantage: What No Other LA Neighborhood Can Match
Here’s what makes Van Nuys genuinely different for home additions and ADUs. Because Van Nuys sits inside the City of Los Angeles, homeowners here can pull pre-approved blueprints from LA’s Standard Plan Program and skip months of custom plan-check. That’s a real advantage, but the bigger one is physical. The post-WWII grid is laced with rear alleys, and the typical detached garage sits at the back of the lot, reached from that alley. LA City allows an ADU converted from an alley-accessed garage to have its own postal address and a private entrance that never crosses the main home’s yard. If you live on a hillside lot in Sherman Oaks or a coastal strip in Encino, you can’t replicate that. It’s a rentability and privacy advantage that fuels one of the highest per-capita ADU permit rates in the San Fernando Valley.
Our crew just finished a 500 sq ft garage addition near Hazeltine Avenue and Archwood Street. We stripped the original 100-amp panel, upgraded to 200 amps, then added a subpanel for the ADU. We swapped the homeowner’s builder-grade hollow-core steel door and single-pane aluminum slider for a fiberglass multi-point door with a stainless threshold. The Valley’s triple-digit heat and salt-laden air had already bubbled the paint and rusted the original hinges. The alley-facing entrance got hot-dip galvanized framing and a keypad lock, and the new unit now has its own postal address.
Serving Van Nuys, CA - Our Local Coverage Area
We’re based in the Van Nuys 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 Van Nuys
Yes. LA City allows an ADU converted from an alley-accessed detached garage to receive its own postal address and a private entry off the alley, meaning renters never cross the main home’s yard. This is specific to the alley-laced tract layout of Van Nuys and a few nearby Valley neighborhoods. Hillside and coastal LA properties generally can’t replicate it. Call (707) 383-5338 and we’ll walk you through what your lot qualifies for.
Almost certainly yes. The 1945 – 1965 tract homes in Van Nuys typically have 100-amp panels, and an ADU subpanel plus HVAC and possibly EV charging will overwhelm that. We upgrade the main to 200 amps before adding the subpanel, which also clears the inspection the first time. We’ll confirm the exact scope in your written estimate.
Yes and yes. Van Nuys is within the City of Los Angeles, so ADU and garage conversion projects can use pre-approved Standard Plan blueprints instead of going through full custom plan-check. That routinely cuts months off the permit timeline. We handle the submittal and pull the permits on your behalf.
Salt-laden air from the coast, combined with Valley heat, corrodes electro-galvanized and zinc-plated fasteners in under five years. We spec hot-dip galvanized or stainless hardware on exterior connections, fiberglass doors with stainless thresholds, and marine-grade finishes on railings and fence posts. The cheap inland spec costs more within a decade because you replace it. The coastal spec is the honest price.
R-15 wall insulation, a radiant barrier, and a 2-ton mini-split for a typical 500 sq ft converted garage. Garages here hit 120°F in summer because of the Valley heat island, so a 1-ton unit sized for a coastal ADU will run constantly and never cool the space. We size every system for the actual solar load on your lot, not a generic rule. Call (707) 383-5338 for a written quote specific to your project.
Get Your Written Estimate
Planning a home addition, garage conversion, or sunroom addition in Van Nuys? Call (707) 383-5338 to schedule your free estimate. We’ll give you a written line-item price before any work starts, and if it’s not done right, the 365-Day Done Right Promise says we make it right. That’s the deal in Van Nuys.
Written by Ben Ortega, Owner at Seedling ADU Builders, serving Van Nuys and the San Fernando Valley.