Home Addition Contractor in Pomona - Design, Permits and Build Under One Contract

Fast, Reliable Home Addition Contractor Across Pomona

A home addition in Pomona means adding a room, a second story, or a sunroom onto a house that’s usually been standing since the Truman or Eisenhower administration. And in Pomona specifically, that comes with a particular set of realities: cloth-wrapped wiring behind 1950s drywall, undersized 60-amp electrical panels, and detached garages on alley-accessed lots that are technically sitting in non-conforming rear setbacks. The honest cost range for a room addition here runs $180 – $350 per square foot, a sunroom addition typically lands between $45,000 and $110,000, and a full garage-conversion ADU runs $140,000 – $260,000 depending on what the walls reveal. We’re Home Addition Contractor specialists under the Lodgewick ADU Builders roof, and we serve Pomona with crews who know the permit desk, the housing stock, and the inspector’s expectations. Call (254) 602-5618 for a free estimate, and you’ll get a written price before we touch a single stud.

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Why Lodgewick ADU Builders Is Pomona’s Preferred Home Addition Contractor Company

Pomona homeowners have been through it before with contractors: a price quoted over the phone that changed once the wall came open, a crew that parked across the driveway and left a mess of drywall dust, a permit that stalled at the counter because nobody checked the rear setback. That is exactly what the Kingswell Guarantee is built to prevent. We put the price in writing first. We give you a defined arrival window. We leave the job site cleaner than we found it. And every project carries a written 365-Day Done Right Promise: if it’s not right, we come back and make it right, free.

Russ Delmar leads our Pomona work, and he brings the same expectation to every room addition and sunroom we build: no price changes at the door, no allowances that turn into surprises, no crew members who haven’t been background-checked and uniformed. Pomona roof pitch, Pomona rear-alley access, Pomona’s specific zoning interpretations under SB 9 and AB 68 – our people work with these daily, not twice a year. That’s why homeowners off Garey Avenue, in the Wilton Heights neighborhood, and along Phillips Drive call us back when it’s time for a second project.

Sunroom Addition in Pomona

A sunroom addition in Pomona costs between $45,000 and $110,000, and the range comes down to three things: the foundation type, whether the existing wall needs structural work, and how much glass you’re putting under a Pomona Valley summer sun. At 105°F in August, a sunroom built with bargain single-pane windows and no cool-roof strategy becomes an uninhabitable greenhouse by 2 p.m. We spec low-E glazing, insulated roof panels, and mini-split cooling as baseline choices – not upgrades – when we design for this climate.

Foundation and Roof Tie-In

Many Pomona sunrooms go onto existing patio slabs that were poured decades ago with no rebar and no footings. The inspector will not sign off on that as living space. We evaluate the slab, pour proper footings where the addition meets the house, and tie the roof into the existing rafters with a saddle that handles both Santa Ana wind uplift and the weight of wet winters.

Permit-Ready from Day One

Opening a wall for a sunroom addition in Pomona means the inspector may require bringing the affected room up to current energy code. If that wall contains ungrounded wiring from 1962, you just triggered an electrical upgrade. We identify this during our inspection, price it in writing before the permit gets pulled, and you never get a bill for a surprise code item mid-project.

Room Addition Contractor in Pomona

A room addition contractor in Pomona typically quotes $180 – $350 per square foot, and the wide range is honest math: a simple bedroom bump-out on a good foundation sits at the lower end, while a room on a completely new slab with plumbing sitting at the higher end. Most Pomona room additions run between $75,000 and $180,000 all-in. The biggest variable in that number is what’s hiding inside the existing wall: old wiring, termite-framing, original uninsulated cavities – all common in Pomona’s post-war homes and all of which add cost the moment you open the drywall.

What the Inspection Reveals

Russ Delmar’s rule on room additions is simple: we don’t finalize the quote until we’ve looked inside the wall. That means drilling a small access hole at the tie-in point, checking the panel rating, and looking at the sill plate from the crawlspace. What a 1955 ranch off Phillips Drive reveals – cloth-wrapped wiring, a 60-amp panel from 1958, termite-softened framing – changes the real cost. We write every one of those findings into the contract as a priced allowance before we start, so the final number is a number you signed off on.

Code Upgrades That Come With the Job

Here’s the thing that surprises most Pomona homeowners: when a permit gets pulled on a 1950s home, the inspector may require the entire existing structure’s smoke detectors, the affected room’s insulation, and sometimes the main panel to meet current code. A 60-amp panel won’t pass for a room addition that includes any new circuits. We tell you this at the first walkthrough, not after the drywall is staged. A room addition with Russ means you know the true cost of the permit before the permit exists.

Trusted Brands We Service in Pomona

For Pomona homeowners who want the speed and factory consistency of a prefab addition, we work directly with Cover, Dvele, and Boxabl systems. These work especially well on Pomona’s alley-accessed lots where a crane can drop a module in the rear yard without disturbing the main house. We also carry the consumables and finish materials for Pomona’s climate: James Hardie siding for Santa Ana wind resistance, cool-roof assemblies for the summer heat, and mini-split heat pumps sized for rooms that will get afternoon exposure. We spec the brand, then we bid it in writing.

Common Home Addition Contractor Problems We See in Pomona Homes

• Undersized electrical panels. A 60-amp or 100-amp original panel can’t feed a room addition with modern lighting, outlets, and mini-split HVAC. We quote the 200-amp panel upgrade as a line item on the front end, not a discoverable “extra” later.
• Termite damage at the sill plate. Pomona’s post-war framing sits on foundation stem walls that were never treated, and subterranean termites love that transition zone. We sister framing and replace the sill before we tie in new construction, because covering it up is how a room addition fails the next buyer’s inspection.
• Non-conforming rear setbacks on garage conversions. Detached garages off Pomona alleys were often built within what are now illegal setbacks under current code. AB 68 and SB 9 provide protection, but only if the project qualifies. We verify the setback protection in writing before we file anything.
• Skimped insulation on west-facing walls and roofs. A detached addition with wall insulation meant for a coastal climate is unlivable in a Pomona August. We treat spray-foam insulation and a cool-roof underlayment as baseline, not an upgrade.

Pricing for Home Addition Contractor in Pomona, CA

We Also Serve Cities Near Pomona

We work across the eastern San Gabriel Valley, so if you’re in Diamond Bar, Montclair, Chino Hills, or Claremont, the same written-price policy and 365-Day Done Right Promise apply. For more about us and our service area, see Home Addition Contractor in Pomona. We serve Pomona from our Los Angeles-based scheduling office and dispatch locally.

FAQs About Home Addition Contractor in Pomona