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 Van Nuys
Let’s talk numbers first, because that’s what actually matters when you’re planning a home addition in Van Nuys. A room addition in this part of the San Fernando Valley typically runs $220 – $380 per square foot, so a 400-square-foot sunroom lands somewhere around $88,000 – $152,000, while a full second-story addition on a pre-war ranch usually starts near $275,000 and climbs from there. A second story is the priciest option because it involves structural work, foundation checks, stair placement, and often temporary relocation. You’ll get the exact figure from us in writing before demolition day, never as a verbal ballpark that shifts later. Call (903) 568-7222 and we’ll scope it properly against the actual Van Nuys permitting path, not a generic Los Angeles estimate.
Van Nuys is one of the East Valley’s largest flatland grids, stretching from the 91401 and 91405 ZIPs north of the 101 up past Vanowen Street, with blocks of 1940s stucco ranches south of Victory Boulevard and later mid-century builds toward Sepulveda Basin. Our crews work these streets weekly. We know which homes near Van Nuys Boulevard and Kittridge Street sit on post-war slabs versus raised foundations, and why that single detail changes the cost of any bump-out or second-story plan before we ever submit to LADBS. Scheduling and dispatch run through our Los Angeles office, but the crew assigned to your job works locally in Van Nuys, so you’re not waiting on a crew driving in from across the county.
Why Benson ADU Builders Is Van Nuys’s Preferred Home Addition Contractor Company
Homeowners around Van Nuys tend to ask the same three questions before they sign anything: Is the price in writing? Who exactly is walking onto my property? What happens if the work isn’t right six months from now? We answer all three the same way every time, and that consistency is why our local reputation holds up.
Every project gets a written price before work starts. Not a range. Not a “we’ll see how it goes.” Troy Eastman runs the business on that principle, and it’s baked into The Relay Visibility Guarantee. You’ll also get a written guarantee on the work, covered by our 365-Day Done Right Promise. If something isn’t right within a full year, we come back and make it right, at no charge. Reviews from Van Nuys customers consistently mention the same things: the price didn’t move, the crew showed up in uniform and on schedule, and the final invoice matched the original line items. No background noise, no surprises at the door.
When you call (903) 568-7222, a live person answers. Not a voicemail tree, not a callback request that goes cold. That matters when you’re mid-remodel and have a question about the permit inspection that’s scheduled for Thursday. It’s one of the small things that makes a big difference when you’re living through construction.
Sunroom Addition in Van Nuys
A Sunroom Addition in Van Nuys is one of the most cost-effective ways to add livable square footage without tearing into the existing roofline or foundation. Most sunrooms here run $88,000 – $152,000 for a finished 400-square-foot space, depending on whether you go with a prefab panel system from someone like Dvele or Mighty Buildings, or a fully site-built structure. The permitting path is simpler than a second story, since a single-story sunroom rarely triggers the airport height review. LADBS still requires plans, structural calcs, and title-24 energy compliance, and your lot’s R1 setback and floor-area ratio under the Van Nuys Community Plan will dictate how far you can push the footprint.
What actually gets built
A sunroom addition typically includes footings or a slab edge, aluminum or vinyl glazing, a thermally broken frame, and a roof tie-in that doesn’t compromise the existing eave line. In Van Nuys heat, we spec low-E glass and add ridge or soffit venting so the space doesn’t become an oven by 2 p.m. in August.
When it makes sense
Sunrooms are a strong fit for homeowners who need a bright workspace, a plant room, or a casual dining area without the cost of a full foundation-and-framing addition. They also permit faster than a second story, which matters if you’re trying to beat a lease renewal or host family for the holidays.
Second Story Addition Contractor in Van Nuys
A Second Story Addition Contractor in Van Nuys has to deal with two realities that don’t exist in Sherman Oaks or Encino: pre-war foundation footings and the Van Nuys Airport Part 77 height surface. Lifting a roof to add a second story on a 1940s ranch near Kittridge Street or Vanowen often means underpinning the existing footings before the first new wall goes up. That’s not a cheap surprise, and it’s the number one reason quotes from contractors who haven’t actually worked in Van Nuys come in low and then change once the slab is open. A full second-story addition in Van Nuys usually starts around $275,000 and can exceed $400,000 once you factor structural upgrades, stair placement, and temporary relocation during the build.
Airport height review, explained plainly
The Van Nuys Airport floor sits at about 1,600 feet of airspace, and any roof that pokes above that imaginary surface needs a Part 77 review as part of the permit package. Most single-story additions clear it without issue. A second story on a house already close to the surface line can get flagged, which stalls the permit and can force a lower ceiling height or a flatter roof. We check this before you spend a dollar on plans.
Foundation reality check
Many Van Nuys homes south of Victory Boulevard were built before 1950 on raised foundations with shallow footings. Before we frame an upper level, we open a test pit to verify what’s actually holding the house up. If the footings are undersized, underpinning gets added to the written scope and the price. Better to know on day one than day forty.
Trusted Brands We Service in Van Nuys
We’re authorized to build with several prefab and panelized systems that Van Nuys homeowners can research independently before they ever talk to a salesperson. Dvele and Mighty Buildings both offer factory-built wall, floor, and roof panels that arrive on a flatbed and get craned into place, reducing on-site framing time by weeks compared to stick-built construction. Boxabl gives us a modular room option that works well for compact bump-outs and office additions where the lot can’t easily accommodate a full ground-up build. For cladding and finish materials, we use James Hardie fiber cement products engineered for the San Fernando Valley’s dry heat and intense UV exposure. We stock common trim, flashing, and panel components locally for Van Nuys jobs, which keeps smaller fixes and material callbacks off the critical path.
Common Home Addition Contractor Problems We See in Van Nuys Homes
- Underpinning surprises on pre-war foundations. Homes built in the 1930s – 1940s around Van Nuys Boulevard and Kittridge Street often have shallow footings that can’t carry a second story. If your contractor doesn’t verify this early, you’re looking at a five-figure change order mid-framing.
- Airport-height review blindsides the permit. A second-story roof that pokes into the Part 77 surface around Van Nuys Airport stalls at LADBS and can force plan revisions. We run this check before architectural drawings get finalized.
- Setback and floor-area ratio misreads. The Van Nuys Community Plan enforces R1 zone setbacks and a floor-area ratio cap. Misreading the survey can shrink your buildable footprint after you’ve already signed, leaving you with a smaller addition than you planned.
- Valley heat ignored in the HVAC spec. Addition plans drawn without accounting for Van Nuys’s summer basin heat end up with undersized ducting and underpowered units. We size HVAC for the actual heat load, including radiant-barrier and cool-roof detailing where it pays back fast.
Pricing for Home Addition Contractor in Van Nuys, CA
Here’s an honest breakdown of what additions cost in Van Nuys as of early 2026:
- Sunroom addition (250 – 400 sq ft): $88,000 – $152,000 finished
- Room addition, site-built (400 – 600 sq ft): $95,000 – $210,000 depending on plumbing and finish level
- Second-story addition (600 – 900 sq ft): $275,000 – $420,000 including structural and stairwork
- Bump-out addition (80 – 150 sq ft): $24,000 – $55,000
- Bathroom addition (full bath): $55,000 – $95,000
- Garage addition (ADU conversion or new build): $85,000 – $185,000
What moves the price in Van Nuys specifically is foundation condition, proximity to the Part 77 height surface line, and the finish level you choose. Our quotes are line-item fixed, the price is in writing before work starts, and there are no change orders unless you change the scope. Call (903) 568-7222 for a free estimate on your specific property.
We Also Serve Cities Near Van Nuys
Our Home Addition Contractor team works throughout the East Valley corridor. If you’re in Sherman Oaks, Studio City, North Hollywood, or Encino, we bring the same written pricing, permit knowledge, and 365-Day Done Right Promise to your project. For a closer look at what we do right here, see our page on Home Addition Contractor in Van Nuys.
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, if the proposed roof height pokes above the Part 77 imaginary surface around Van Nuys Airport, which sits at roughly 1,600 feet of airspace. Most single-story additions clear it without a second thought, but second-story additions on lots already close to the surface line can trigger a review that stalls the permit and may force a lower ceiling height. We check this before plans are drawn, so you don’t pay for architectural work that LADBS will bounce. Call (903) 568-7222 and we’ll check your specific address against the surface map for free.
In Van Nuys, a home addition moves through five phases: surveying and design against the Van Nuys Community Plan zoning, LADBS plan check and permit issuance, foundation and structural verification (including underpinning checks on pre-war homes), framing and mechanicals, then finishes and final inspection. A typical room addition takes 3 – 6 months from first call to final sign-off. A second story usually runs 6 – 10 months. The difference is structural work and the airport height check. Call (903) 568-7222 to get a project calendar mapped against your address.
Only two things change our written price after work begins: a scope change you request mid-project, or a hidden condition we document and walk you through before any new work proceeds. An example: the foundation test pit on your 1940s ranch near Victory Boulevard reveals footings that need underpinning. We show you photos, give you the new line item, and get your sign-off before we spend a dollar. No silent re-bills, no “it got more complicated” invoice at the end.
A second-story addition in Van Nuys typically takes 6 – 10 months from permit submission to final inspection. The foundation verification and any underpinning work is the first stretch, followed by framing, roof tie-in, mechanicals, stairs, and interiors. The Part 77 airport review, if triggered, can add 3 – 6 weeks at the permit stage. We sequence the work so you can stay in the house for as long as possible, and we’ll give you a week-by-week calendar in writing before we start.
Yes, but only with the right glazing and ventilation. Van Nuys reliably hits triple digits in July and August, and a sunroom with standard single-pane glass becomes unusable by midday. We spec low-E insulated glass, add ceiling or ridge venting, and often include a radiant-barrier roof assembly to cut heat gain. Done right, the room is comfortable year-round. Done wrong, it’s a greenhouse you’ll avoid for four months a year. Call (903) 568-7222 and we’ll spec it for Van Nuys heat, not coastal assumptions.
Planning a home addition in Van Nuys is a big decision. The smartest first move is getting a real number against your actual lot, foundation, and the LADBS path specific to your address. We’ll give you that number in writing, for free. Call (903) 568-7222 to schedule your free estimate, or reach out and we’ll map your project calendar before you commit to anything.
Written by Troy Eastman, Owner at Benson ADU Builders, serving Van Nuys with written pricing and a 365-Day Done Right Promise on every project.
