ADU Company in Rancho Cucamonga, CA
Lodgewick ADU Builders handles accessory dwelling units, garage conversions, and home additions across Rancho Cucamonga, from the oversized lots in Alta Loma to the tract-home communities of Terra Vista. Rancho Cucamonga jobs come with specific challenges: Santa Ana wind loads through Cucamonga Pass, 105°F summer heat that changes how we size HVAC in converted garages, and HOA rules that shifted only recently under AB 670. We put a written price in front of you before any work begins. Call (254) 602-5618 for a free estimate.
Why Rancho Cucamonga Homes Are Different
Rancho Cucamonga’s housing stock spans three eras, and each one shapes an ADU project differently. The 1960s and 70s ranch homes in Alta Loma and Etiwanda sit on 10,000 to 20,000+ square foot parcels originally platted as semi-rural horse property. A detached ADU on one of those lots has room to breathe, but the old parcel lines and utility easements often require careful siting. Down in Terra Vista and Victoria, the 1980s and 90s attached-garage tract homes are tighter, and for years those HOAs told owners they could not build an ADU at all. AB 670 changed that in 2019, and we now field steady calls from Terra Vista homeowners who want to convert a garage they were told was off-limits. The third group is newer infill subdivisions, where setbacks are tighter and the design conversation starts with a smaller footprint.
The climate adds another layer. Rancho Cucamonga sits at the mouth of Cajon Pass, and Santa Ana wind events regularly hit 60 to 80 mph in the northern foothills. A detached ADU roofline, its anchor connections, and the roofing material itself all need to be engineered for those localized wind loads, which exceed what most Inland Empire jurisdictions assume. Summer highs above 105°F mean a garage conversion starts with almost zero thermal mass, so continuous insulation and correctly sized HVAC are design decisions, not afterthoughts. A builder who treats Rancho Cucamonga like any other Inland Empire city will get the engineering wrong.
Our Main Rancho Cucamonga Services
The three calls we hear most often in Rancho Cucamonga are about adding square footage to an existing home, converting an attached garage into living space, and building a detached ADU in the backyard. Each has its own dedicated Rancho Cucamonga page below.
Home Addition Contractor in Rancho Cucamonga
Home additions in Rancho Cucamonga usually mean adding a primary suite, expanding a kitchen, or building out a family room on one of the city’s larger lots. On a 1970s Alta Loma ranch, the addition often ties into roof lines that were framed for a different era, and the wind loads through Cucamonga Pass mean the new roof-to-wall connections need more than standard strapping. We handle the full scope, from architectural drawings through permits to final inspection, with a written price before any work starts. This is Russ Delmar’s bread and butter. Learn more on our Home Addition Contractor in Rancho Cucamonga page.
Garage Conversion Contractor in Rancho Cucamonga
Garage conversions in Rancho Cucamonga run into two recurring issues: the 105°F summer heat and the HOA history. A garage has no thermal mass, so insulation and HVAC sizing have to be planned from day one, not bolted on at the end. In Terra Vista and Victoria, many owners were told for years that their HOA prohibited ADUs. AB 670 overrides that, which means a lot of pent-up demand is now moving forward. We pull permits, handle the design, and provide a written guarantee on every conversion. Details are on the Garage Conversion Contractor in Rancho Cucamonga page.
ADU Builders in Rancho Cucamonga
Detached ADUs in Rancho Cucamonga make the most sense on the large Alta Loma and Etiwanda lots where there is actual room to build. Owners there routinely have half-acre parcels that neighboring Ontario cannot match. We design and build the ADU, coordinate the foundation and utility connections, and manage the permit process end to end. For foothill parcels in the Very High Fire Hazard Severity Zone, we also handle the ember-resistant venting and Class A roofing requirements that surprise owners who only read the city’s standard ADU checklist. Russ Delmar walks every Rancho Cucamonga ADU job personally. See the full picture on our ADU Builders in Rancho Cucamonga page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Rancho Cucamonga
We work regularly with Dvele, Cover, and Boxabl on prefab ADU projects in Rancho Cucamonga. Each brings different strengths: Dvele for high-end energy performance, Cover for precision panelized builds, and Boxabl for speed on simpler lots. We match the system to your lot, budget, and timeline. See our brands for more detail.
Pricing for ADU Company in Rancho Cucamonga, CA
| Service | Typical range in Rancho Cucamonga |
|---|---|
| Detached ADU (1 bed, 1 bath, ~500 sq ft) | $180,000 – $260,000 |
| Detached ADU (2 bed, 2 bath, ~800 sq ft) | $260,000 – $350,000 |
| Detached ADU (3 bed, 2 bath, ~1,000+ sq ft) | $350,000 – $500,000+ |
| Prefab ADU (Boxabl, ~400 sq ft) | $120,000 – $190,000 |
| Garage conversion (attached, ~400 sq ft) | $95,000 – $160,000 |
| Garage conversion (attached, ~600+ sq ft) | $160,000 – $230,000 |
| Home addition (primary suite, ~400 sq ft) | $140,000 – $220,000 |
| Home addition (kitchen expansion, ~200-300 sq ft) | $90,000 – $160,000 |
| JADU (junior ADU, ~500 sq ft max) | $110,000 – $160,000 |
Two things push Rancho Cucamonga prices above the Inland Empire average: wind-load engineering for Santa Ana events in the northern foothills, and fire-hardening requirements on parcels in the Very High Fire Hazard Severity Zone. Both are real costs that show up in permits and materials, and both are cheaper to plan for in the estimate than to discover mid-build. Every Lodgewick estimate is a written, line-item price before any work starts, and that price does not change at the door.
Neighborhoods We Serve in Rancho Cucamonga
We work across the full city, from the foothill parcels in the north to the master-planned communities in the south. Response times for estimates are typically a few days out, and we schedule around your availability.
- Alta Loma
- Etiwanda
- Terra Vista
- Victoria
- Haven View
Service Area – Cities Near Rancho Cucamonga
Beyond Rancho Cucamonga, we serve the neighboring communities along the 210 and 15 corridors. That includes Upland, CA to the west, Ontario, CA to the south, Claremont, CA just over the county line, and Montclair, CA between them. If you are unsure which page covers your address, call us and we will point you the right way.
Serving Rancho Cucamonga, CA - Our Local Coverage Area
We’re based in the Rancho Cucamonga 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 ADU Company in Rancho Cucamonga
Most Rancho Cucamonga estimates are scheduled within a few business days. We give you a defined arrival window, not an all-day “sometime Tuesday.” Written estimates follow within a week of the site visit. Call (254) 602-5618 to schedule yours.
No, not in most cases. California’s AB 670, passed in 2019, prevents HOAs from banning ADUs entirely. They can still impose reasonable design standards, but they cannot say no. We have handled Terra Vista and Victoria projects under these rules. Call (254) 602-5618 if you want us to check your specific HOA’s CC&Rs.
Yes, if your parcel is in the Very High Fire Hazard Severity Zone, which covers many foothill lots along Almond Street and Hillside Road. Your ADU will need ember-resistant venting, Class A roofing, and ignition-resistant wall cladding. We identify this in the estimate phase so you are not surprised by a second compliance track later. Call (254) 602-5618 for a free estimate that accounts for your specific parcel.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Rancho Cucamonga Customers Say
"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"A whole backyard ADU from scratch. Terrified me going in, but they kept me updated weekly and there were no nasty surprises. Quality work and a fair price."
- Noreen Fletcher"Built a backyard unit for my mother in law. They handled the permits, gave me a real timeline, and stuck to it within a few days. The written price is what we paid, which anyone who's done construction knows is rare."
- Dennis Fairchild