Fast, Reliable Home Addition Contractor Across Granada Hills
A home addition in Granada Hills typically costs $85,000 – $160,000 for a ground-level room addition, while second-story additions run $180,000 – $280,000 depending on foundation and structural work. Most project timelines stretch 4 – 7 months from first inspection to final sign-off, with north-of-Rinaldi jobs adding 3 – 6 weeks for fire-zone plan review. We’re Lodgewick ADU Builders, and we serve Granada Hills homeowners who want a written price before demolition, a crew that shows up when promised, and a guarantee in writing. Call (254) 602-5618 if you’re weighing an addition and want a real number.
We know Granada Hills because we work here constantly. The ranch houses off Balboa Boulevard, the cul-de-sacs near Granada Hills Charter, the hillside lots climbing toward the Santa Susana foothills above Rinaldi Street. Each neighborhood has different lot configurations, different setbacks, and different fire-zone requirements. A contractor who treats Granada Hills like any other San Fernando Valley zip code will miss something expensive.
Why Lodgewick ADU Builders Is Granada Hills’s Preferred Home Addition Contractor Company
We’ve built a reputation in Granada Hills around one simple practice: we write down what we’ll do, what it will cost, and what happens if something goes wrong, before a single nail is driven. That’s The Kingswell Guarantee, and it’s delivered on every project. Homeowners who’ve been burned by a price that changed at the door or a crew that vanished mid-job tend to appreciate that.
Russ Delmar leads our addition and ADU work. He’s spent years walking Granada Hills properties, assessing foundation conditions, reading the quirks of 1950s and 60s ranch construction, and building relationships with LADBS plan reviewers who handle Valley permits. When you call (254) 602-5618, a live person answers. Not a voicemail. Not a chatbot. That matters when you’re mid-project and have a question about a change order or a framing inspection.
Our technicians are background-checked and uniformed, so you always know who’s on your Granada Hills property. And every project carries our 365-Day Done Right Promise. If the work isn’t right within a year, we come back and make it right. Free. It’s in writing, on every contract.
We also work hands-on with prefab addition systems from Cover, Dvele, and Boxabl when a panelized approach fits the lot and budget better than traditional stick framing. For Granada Hills homeowners, that can mean a faster build with less on-site waste, which matters when you’re living in the house during construction.
Sunroom Addition in Granada Hills
A sunroom addition in Granada Hills runs $45,000 – $85,000 depending on glazing quality, foundation work, and whether you’re adding HVAC or keeping it as an unconditioned three-season room. The value here is real: Granada Hills gets roughly 280 sunny days a year, and a well-built sunroom off the back of a ranch house gives you a bright living space without the full structural cost of a room addition. We’ve built sunrooms off kitchens on Lemarsh Avenue, off living rooms up near O’Melveny Park, and as standalone structures in backyards with enough setback.
The fire-zone rules north of Rinaldi apply to sunrooms too. If your property falls within the Very High Fire Hazard Severity Zone, the glazing and exterior cladding have to meet Chapter 7A ignition-resistance standards. We spec that from the start, not mid-permit.
Three-Season Builds vs. Conditioned Spaces
Many Granada Hills homeowners choose a three-season sunroom with operable windows and ceiling fans, keeping costs down and avoiding the mechanical load of air conditioning a glass-heavy space. But if you want to use it in August, when Granada Hills regularly pushes past 105°F, we’ll size a mini-split or extend your home’s HVAC. The inland Valley heat is unforgiving, and undersized cooling in a sunroom is miserable.
Foundation Choices on Large Lots
Granada Hills lots often run 9,000 – 15,000 sq ft, which gives you flexibility on placement. We typically recommend a slab-on-grade foundation for a sunroom addition, but on hillside lots above Rinaldi we’ll often go with a raised foundation or pier system depending on slope and drainage. The 1960s ranch homes here often have clay-heavy soil that expands and contracts, so a sloppy foundation detail will crack within a few seasons.
Room Addition Contractor in Granada Hills
As a room addition contractor serving Granada Hills, we price a standard 300 – 500 sq ft ground-level addition at $95,000 – $160,000, finished and permitted, depending on whether you’re adding a bathroom, what the kitchen tie-in looks like, and what condition we find inside your existing walls. That last part is what separates an honest quote from one that will balloon. We inspect first, write allowances into the contract, and price surprises in writing before touching anything.
Opening up a Granada Hills ranch house built between the mid-1950s and early 1970s regularly turns up conditions no one planned for. Cloth-wrapped wiring. Pest-damaged sill plates. Post-Northridge cripple-wall retrofits of wildly varying quality. These conditions aren’t rare; they’re the norm. The key is that they get priced before demolition, not discovered after and billed as change orders you never approved.
How We Handle Code Upgrades
When you open walls on a permitted addition, LADBS will require certain things: ground-fault circuit interrupters on new circuits, tamper-resistant outlets, upgraded smoke and CO detection interconnects, and often a full electrical service evaluation. We write an allowance into every Granada Hills room addition contract specifically for code-mandated upgrades. If we don’t use the full allowance, you get that money back. If we need a little more, you approve it in writing first.
The North-of-Rinaldi Permitting Reality
If your Granada Hills property sits in the Very High Fire Hazard Severity Zone above Rinaldi Street, your addition permit routes through LADBS VHFHSZ specialist review. That adds 3 – 6 weeks to the plan-check queue. Out-of-area contractors don’t know this until the schedule slips. We build it into the timeline from the first conversation. This is one of the biggest differences between a Granada Hills bid and a generic Valley bid, and it’s why our Home Addition Contractor team factors fire-zone review into every northern Granada Hills proposal.
Trusted Brands We Service in Granada Hills
We install and service addition structures from Cover, Dvele, and Boxabl, and we keep common parts and materials staged for Granada Hills projects so we’re not waiting on a shipment from the East Coast when a delivery slips. If you’re considering a prefab or panelized addition rather than traditional stick framing, we can walk you through how a Dvele or Cover panel system performs in the Valley’s heat and Santa Ana wind exposure. A factory-built system isn’t right for every lot, but on a flat 10,000 sq ft Granada Hills parcel with good access, it can shave weeks off the build and mean fewer open-wall surprises. We’ll give you an honest comparison against a stick-built addition, and it’s always your call.
Common Home Addition Contractor Problems We See in Granada Hills Homes
- Cloth-wrapped wiring hiding behind drywall. Most Granada Hills ranch homes still have their original 1950s – 70s electrical. Once a wall is open, LADBS requires upgrades on any circuit you touch, and an honest bid prices that from the start.
- Uneven post-Northridge foundation repairs. The 1994 earthquake epicentered a few miles from Granada Hills, and many homes got cripple-wall retrofits of inconsistent quality paid for through insurance settlements. Some are excellent. Some are not. We evaluate the foundation before designing any addition tie-in.
- VHFHSZ plan-check rerouting north of Rinaldi. If your property is in the Very High Fire Hazard Severity Zone, your permit goes to a specialist reviewer. That’s 3 – 6 weeks most contractors don’t tell you about until the schedule slips.
- Undersized HVAC specs from coastal-default assumptions. Granada Hills summer temperatures regularly exceed 105°F. A contractor who sizes cooling based on a Santa Monica spec will deliver an addition that can’t hold temperature, and you won’t know until August.
Pricing for Home Addition Contractor in Granada Hills, CA
Here are working numbers for Granada Hills, as of 2026. A sunroom addition runs $45,000 – $85,000. A ground-level room addition of 300 – 500 sq ft runs $95,000 – $160,000 finished. A second-story addition runs $180,000 – $280,000, with the wide range driven by foundation capacity, whether the lower floor can carry the load without major structural work, and fire-zone requirements if you’re north of Rinaldi. A bathroom addition inside an existing footprint runs $60,000 – $95,000. A bump-out of 50 – 100 sq ft runs $50,000 – $90,000 depending on foundation type and finish level.
What moves the number: structural condition of the existing house, code upgrades triggered by opening walls, VHFHSZ compliance if applicable, and the level of finish you choose. We never give a phone estimate and surprise you later. We walk the property, open the inspection points we need to, and write a line-item price. The estimate is free. Call (254) 602-5618 to schedule yours.
We Also Serve Cities Near Granada Hills
In addition to Granada Hills, our crews serve Home Addition Contractor in Granada Hills neighbors across the northwest Valley, including San Fernando, Northridge, Porter Ranch, and Chatsworth. If you’re unsure whether we cover your street, call (254) 602-5618 and ask. A live person will tell you straight.
Serving Granada Hills, CA - Our Local Coverage Area
We’re based in the Granada Hills 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 Granada Hills
Because properties north of Rinaldi Street fall within Los Angeles’s Very High Fire Hazard Severity Zone, which routes addition and ADU permits through LADBS VHFHSZ specialist review. That adds 3 – 6 weeks to the plan-check timeline. A house a mile or two south in Reseda or Van Nuys doesn’t trigger that routing. It’s not a guess; it’s a code requirement tied to the Santa Ana wind exposure and chaparral slope terrain along the foothills. We build that timeline into every northern Granada Hills proposal from day one. Call (254) 602-5618 and we’ll check your parcel’s fire-zone status before we even bid.
Most commonly: original cloth-wrapped wiring, pest-damaged sill plates, degraded waterproofing at the mudsill, and post-Northridge cripple-wall repairs of uneven quality. We opened a 1962 ranch on a 12,000 sq ft lot off Balboa Boulevard near the Rinaldi corridor for a rear room addition and found exactly that combination. We stopped work, documented each condition with photos, and priced the framing, wiring, and waterproofing upgrades in a written change order before touching anything else. None of it appeared on the final invoice as a surprise. That approach is standard for us, not a special case.
Three ways. First, we inspect before we bid, including checking the foundation condition, electrical service, and any fire-zone requirements. Second, we write a code-upgrade allowance into every contract, so the inevitable trigger items aren’t surprises. Third, any condition we couldn’t see before demolition gets documented with photos, priced in writing, and approved by you before we proceed. If we didn’t find it, we didn’t price it, and you see a change order before a tool touches it. A quote that balloons is a quote that was lazy from the start. Call (254) 602-5618 for a free on-site estimate.
Yes, and this is a Granada Hills-specific issue. The inland Valley heat pocket pushes summer temperatures past 105°F regularly, and the area’s position at the valley’s northwestern edge means strong Santa Ana wind exposure. We size cooling loads for that reality, not for a coastal default. We also specify reflective roofing and proper glazing orientation to reduce heat gain. A contractor who sizes HVAC for a Santa Monica spec will leave you with a 500 sq ft addition that can’t hold 78°F in August. We won’t.
Yes. If your Granada Hills property is north of Rinaldi and inside the Very High Fire Hazard Severity Zone, any permitted addition, including a sunroom, must meet Chapter 7A ignition-resistant construction standards for exterior cladding, glazing, and in many cases a fire sprinkler system. The rules apply to the structure, not how you use it. We spec ember-resistant vents and ignition-resistant cladding from the first drawing, so the plan check doesn’t bounce back. The good news is that a sunroom is a simpler structural build than a full room addition, so even with fire-zone compliance, it’s usually the most cost-effective way to add living space on a northern Granada Hills lot. Call (254) 602-5618 and we’ll evaluate your parcel’s specific requirements. Estimates are free.
Written by Russ Delmar, Owner at Lodgewick ADU Builders, serving Granada Hills and the northwest San Fernando Valley.