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 Home Gardens
Adding a room to a Home Gardens home usually costs between $180 and $420 per square foot, depending on whether you’re building a sunroom, a bump-out, or a full second-story addition. Most ranch homes here from the 1950s and 60s sit on 7,200+ square foot lots, which gives you room to work with. But before any framing starts, there’s one thing Home Gardens homeowners deal with that neighbors in Corona or Riverside rarely think about: septic. If your addition adds a bedroom, Riverside County requires a percolation test before the permit moves forward. That single test can change your timeline and your budget. Call (831) 292-4191 for a free estimate, and we’ll walk you through exactly what your lot will trigger.
Why Lodgewick ADU Riverside Is Home Gardens’s Preferred Home Addition Contractor Company
Home Gardens is unincorporated Riverside County, which means slower permit processing and stricter septic rules than what homeowners face in nearby incorporated cities. We know how that shapes a project. Our crew has worked on ranch homes off Magnolia Avenue, near the Home Gardens neighborhoods south of Highway 91 and east of Serfas Club Drive, and we’ve learned what inspectors in this jurisdiction actually flag. That local knowledge means we don’t submit plans that get kicked back for missing percolation tests or outdated electrical load calculations. We file it right the first time.
Led by Russ Delmar, our team operates under The Kingswell Guarantee. That means a written price before any work begins, a defined arrival window, a clean job site, and a written guarantee on every project. If something isn’t done right within 365 days, we come back and make it right. No phone tag, no chasing. A live person answers our calls 24/7, which matters when you’re mid-project and need a straight answer.
Homeowners in Home Gardens have told us the same story again and again: a contractor quoted one number, started tearing into the wall, found old wiring or rotted framing, and the price jumped. We handle it differently. Our Home Addition Contractor team writes allowances for exactly those discoveries into the contract up front, and every change order gets your written sign-off before we proceed. Russ Delmar built that process around a simple idea: you should never pay for a surprise you didn’t approve.
Sunroom Addition in Home Gardens
A Sunroom Addition in Home Gardens typically runs $35,000 to $85,000 depending on size, foundation type, and whether you want heating and cooling. Home Gardens summers push past 95°F regularly, so a sunroom without a mini-split HVAC becomes unusable from June through September. We recommend cooling on nearly every sunroom we quote here. The mild winters mean you won’t need heavy insulation, which keeps the cost per square foot lower than what you’d pay in colder climates.
Permitting and Septic Constraints on Sunrooms
Here’s the good news for Home Gardens homeowners: a sunroom that doesn’t add a bedroom usually doesn’t trigger a septic percolation test. If it’s a living space without sleeping quarters, the county treats it differently. But you still need a building permit, and the foundation has to meet Riverside County’s setback requirements for unincorporated land.
What Our Sunroom Builds Include
We frame the room on a reinforced slab, install low-E glass rated for inland sun exposure, and run electrical to a separate subpanel where needed. Cool-roof materials come standard. The written quote includes everything: slab, framing, glazing, roofing, electrical, and finish work. Nothing gets left for a “later discussion.”
Room Addition Contractor in Home Gardens
As a Room Addition Contractor serving Home Gardens, we tell every homeowner the same thing before they commit: if this addition adds a bedroom, your septic system becomes part of the project. A typical bedroom addition here costs $80,000 to $160,000, and the septic upgrade (if required) adds $10,000 to $25,000 on top. That’s the number most Home Gardens homeowners never hear from other contractors until the county rejects the permit.
Opening Up a 1960s Home Gardens Ranch
Our crew opened a 1962 ranch on Magnolia Avenue for a 500 sq ft bedroom addition and found the original 60-amp panel still feeding cloth-wrapped branch circuits. We stopped work, wrote the panel upgrade and AFCI retrofits into a change order, and got the owner’s written approval before we touched another wire. The job passed Riverside County inspection the first time. That’s how Home Gardens projects should go: you know the cost before the cost exists.
Framing, Shear, and Stucco on 1950s – 70s Homes
Older stucco tract homes in Home Gardens weren’t built with the shear capacity modern code expects once you cut new window and door openings. We check the wall framing before we spec the addition, and we include any needed shear reinforcement in the written quote. Skipping that step leads to cracked stucco, sagging headers, and a county inspector who won’t sign off. We don’t skip it.
Trusted Brands We Service in Home Gardens
We work with established prefab ADU and addition manufacturers including Cover, Dvele, and Mighty Buildings, matching the panel system to your Home Gardens lot, budget, and timeline. Prefab can cut framing time by weeks, which matters when Riverside County’s permit clock is already slow. We also use James Hardie siding on most additions here because it holds up to the inland heat without warping or fading. If you’re comparing prefab options, we’ll give you straight answers on which systems work on a septic-constrained Home Gardens lot and which ones don’t.
Common Home Addition Contractor Problems We See in Home Gardens Homes
- Septic percolation tests skipped at the start. The contractor frames the addition, the county reviews the permit, and discovers the lot can’t handle another bedroom without a septic upgrade. Now the owner pays for both the upgrade and the rework.
- No electrical panel allowance in the quote. A 1950s or 60s Home Gardens home often still has a 60-amp or 100-amp panel. Adding a bedroom, bath, or second story pushes the load past capacity, and the owner gets a surprise $4,000+ change order mid-project.
- Stucco shear capacity ignored before cutting openings. We see remodelers cut new windows into 1950s stucco walls without checking the framing. The existing stucco cracks, the wall shifts, and the county flags it. Fixing that after the fact costs more than doing it right from the beginning.
- No written change-order process. The homeowner approves a scope verbally, the scope changes, and there’s no paper trail. When the bill arrives, nobody remembers who agreed to what. We put every change in writing with a signature before the work happens.
Pricing for Home Addition Contractor in Home Gardens, CA
Here are the ranges we give Home Gardens homeowners when they call:
- Sunroom addition: $35,000 – $85,000 (no bedroom, usually no septic trigger)
- Bedroom addition (single room): $80,000 – $160,000 (septic upgrade may add $10,000 – $25,000)
- Bump-out addition (150 – 300 sq ft): $45,000 – $110,000
- Second-story addition: $180 – $280 per sq ft, plus $15,000 – $40,000 if the lower foundation needs reinforcement
- Garage addition/conversion: $60,000 – $120,000, with septic only triggered if you add a bedroom
These are written ranges, not verbal guesses. The final number comes from the percolation test (if one’s needed), the panel load, the framing condition, and the finish level you want. Call (831) 292-4191 for a free estimate and we’ll tell you which of these line items actually apply to your Home Gardens lot.
We Also Serve Cities Near Home Gardens
Our crews work throughout the Inland Empire, including Riverside, Ontario, Fontana, and Chino. If you’re just outside Home Gardens and wondering whether we cover your street, call (831) 292-4191 and a real person will answer. We coordinate scheduling from the Riverside – San Bernardino office and send local crews to each job.
Serving Home Gardens, CA - Our Local Coverage Area
We’re based in the Home Gardens 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 Home Gardens
Because most Home Gardens homes are on individual septic systems rather than municipal sewer, and Riverside County requires a percolation test whenever an addition increases the bedroom count. If the test shows the existing leach field can’t handle the added load, you’ll need a tank upgrade or a new drain field before the county will issue the final permit. That typically adds $10,000 to $25,000 and several weeks to the timeline. Call (831) 292-4191 and we’ll tell you whether your specific addition is likely to trigger this.
Once walls are open on a 1960s Home Gardens ranch, Riverside County inspectors will require smoke detectors on every floor, AFCI protection on branch circuits, and often a panel upgrade if the home is still on 60-amp or 100-amp service. If the addition affects load-bearing walls, you’ll also need shear wall reinforcement and possibly foundation bolting. We write allowances for these upgrades into the contract before we start, so the “surprise” is already priced.
We stop work, assess the issue, write up a change order with an exact price, and wait for your written approval before we continue. The Kingswell Guarantee means you never pay for a change you didn’t sign off on. On a Home Gardens job with cloth-wrapped wiring and an undersized panel, we priced the upgrade, got the owner’s signature, and passed inspection on the first try. That’s the standard, not the exception.
In most cases, yes. A sunroom that doesn’t add a bedroom is treated as living space rather than sleeping space, so Riverside County doesn’t require a percolation test. The exception is if you add a bathroom to the sunroom, which adds a fixture load and may trigger septic review. We’ll tell you upfront which category your project falls into and what it means for your permit.
Yes. Home Gardens is unincorporated Riverside County, which means permit processing is generally slower than in incorporated cities like Corona or Riverside because the county handles a much larger jurisdiction with fewer planning staff. Expect added review time for any project involving septic, zoning, or structural changes. We factor that into your project schedule and file early enough that the county’s clock doesn’t push your build into the next season.
Written by Russ Delmar, Owner at Lodgewick ADU Riverside, serving Home Gardens and the Inland Empire since 2010.
