Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
CGI Construction in Lake Forest, CA | Square One Builders
Square One Builders provides independent CGI construction service across Lake Forest, including kitchen and bath cabinetry, quartz and granite countertops, shower enclosures, and roofing. We are not manufacturer-affiliated or authorized – we’re a Lake Forest General Contractor who works with CGI products weekly and knows how they hold up under Lake Forest’s inland heat and Santa Ana winds. If you need CGI service in Lake Forest, call (877) 688-9930 for a free estimate.

Why Lake Forest Residents Choose Us for CGI Service
We work with CGI products every week across inland south Orange County, so we know how their cabinets, countertops, roofing, and shower systems actually perform under Lake Forest’s conditions – not just how they look in a showroom. Brent Calloway grew up in Midway City off Bolsa Avenue and learned framing, concrete, and finish work through Golden West College’s Construction Technology program before spending decades on Orange County job sites. That background matters when a CGI roof is leaking after a Santa Ana event or a cabinet box is swelling from attic heat. We’re an independent CGI service provider with no authorization, partnership, or warranty relationship with the manufacturer. What that means for you: we give straight answers about what’s worth repairing and what’s worth replacing, without a brand agenda. See our CGI sales & service page for the full picture of what we handle.
Styles & brands we work with







Common CGI Construction Problems We Solve in Lake Forest
- Cabinet box and door-skin delamination. On south-facing and west-facing Lake Forest kitchens, attic heat and afternoon sun push cabinet temperatures well past what the finish is rated for. We see CGI ready-to-assemble cabinet boxes and door skins separating at the edges, especially in the 1970s and 1980s tract homes along the Bake and Foothill Ranch corridors.
- Countertop seams opening and edge chipping. Lake Forest’s original tract-home cabinets were rarely re-shimmed level before quartz or granite tops were set. Heat cycling makes it worse. We re-level the boxes, then reset and re-seam the stone so it stops moving.
- Walk-in shower pan and underlayment leakage. Many Lake Forest homes still have the original 1970s-to-1990s hot-mop or greenboard assembly hiding behind a newer CGI shower surround. When that was capped over instead of rebuilt, water ends up in the ceiling below. We rebuild the assembly properly and reset the CGI glass.
- Wind-driven rain intrusion and lifted shingle tabs. Santa Ana wind events expose weak spots on CGI asphalt shingle roofs fast, especially on the ridge and rake edges of older Lake Forest tracts. We see uplifted or creased tabs after nearly every significant wind event.
- Cracked stucco and dry-rotted fencing on heat-exposed elevations. Lake Forest’s hot, dry summers accelerate degradation on west-facing stucco and any fencing that never gets shade. We repair and replace those systems before they take out what’s behind them.
CGI Service in Lake Forest: What Local Conditions Mean for Your Equipment
Lake Forest is a master-planned, mostly-built-out city of 1970s-to-1990s tract homes, so nearly all CGI construction work here is remodel-and-repair on aging suburban housing stock, not new ground-up builds. Here’s the part most homeowners don’t know until they’re already frustrated: Lake Forest’s planned villages carry recorded HOA architectural rules layered on top of city planned-community setbacks. A CGI roof replacement or a patio cover often needs HOA architectural committee sign-off before the City of Lake Forest planning counter will even accept the permit. That’s a double gate most inland Orange County cities don’t impose. We’ve handled enough jobs in the Serrano Park and Foothill Ranch areas to know exactly what each association wants to see, and we pull the city permit and clear the HOA exterior-change approval before the first box of material comes off the truck. If you’re in the 92630 zip code and planning CGI work, expect that step – and expect us to handle it for you. Read more about where we work on our Lake Forest service area page.
CGI Models & Products We Service in Lake Forest
We service and install the full CGI product range relevant to Lake Forest homes: CGI Ready-to-Assemble kitchen and bath cabinetry, the CGI quartz and granite countertop program, CGI semi-frameless and frameless glass shower enclosures, and CGI asphalt shingle and standing seam metal roofing lines. When a repair calls for parts, we default to CGI OEM and factory-spec components – hinges, drawer slides, glass channels, and matching roofing accessories – because mismatched aftermarket hardware is what causes callback leaks and sagging doors. We also provide CGI repair in Portola Hills and source quality equivalents only when a line is discontinued. Our honest stance: reface and repair a sound CGI cabinet box or a localized shingle field all day. But once the box is swelling, the shower pan is saturated, or the roof decking is soft, replacement is the only call that holds up.
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AfterCGI Service Pricing in Lake Forest
CGI construction pricing in Lake Forest tracks the scope of the job and the condition of what’s underneath. Here’s what we’re seeing across the 92630 market:
| Service | Typical Range |
|---|---|
| Full Kitchen Remodeling | $14,000 – $45,000 |
| Small Kitchen Remodel | $9,000 – $20,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Full Bathroom Remodeling | $9,000 – $28,000 |
| Roof Replacement & Installation | $8,000 – $20,000 |
| Roof Repair | $400 – $1,800 |
| Standing Seam Metal Roof | $15,000 – $40,000 |
What moves the number most is what we find when the old surface comes off: saturated underlayment, out-of-level cabinets, dry-rotted decking. A free estimate from us includes the inspection that catches those things before they become change orders. Call (877) 688-9930 to schedule yours.
Serving Lake Forest, CA — Our Local Coverage Area
We’re based in the Lake Forest area and know this community well, with CGI service in Mission Viejo also available. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.

FAQs – CGI Construction in Lake Forest
Yes, in most Lake Forest planned villages, the HOA architectural committee reviews exterior changes – including roofing material and color – before the City of Lake Forest will accept the permit application. We handle both approvals as part of the job. Call (877) 688-9930 and we’ll walk you through the exact path for your association.
South-facing and west-facing Lake Forest kitchens, especially in 1970s and 1980s tracts, trap attic heat and direct afternoon sun that push cabinet surfaces well past their rated temperature range. Over years, the finish blisters and the box or door skin separates. Repairs work when the box is still sound; replacement makes sense once the substrate is swollen.
Usually yes – most Lake Forest tub-to-shower conversions only need the drain moved and the valve upgraded, not a full re-pipe. The bigger issue in these homes is what’s behind the tile: original greenboard or a compromised hot-mop pan. We rebuild that assembly before the CGI enclosure goes in, and we offer CGI in Laguna Woods as well. Call (877) 688-9930 for an exact quote.
A properly installed CGI asphalt shingle roof holds up to Santa Ana winds, but only if the field was re-nailed to current code, the ridge and rake edges are fastened for uplift, and the underlayment is sealed at transitions. We install to Lake Forest’s wind exposure, not to a coast-level default, so you’re not picking shingles out of the canyon after the first event.
Setbacks affect additions and exterior work more than interior remodels, and they get reviewed through both the HOA and the City of Lake Forest planning counter. Interior kitchen and bath work only needs the city permit, but if your remodel touches a window, exterior door, or roofline, the HOA architectural committee usually comes into play. We sort out which approvals apply before we start.
Service Areas Near Lake Forest
While we’re based around the Lake Forest area, we also provide CGI construction service in CGI service in Foothill Ranch, CGI service in Aliso Viejo, and the surrounding inland south Orange County communities. If you’re just outside the 92630 boundary, call and we’ll let you know if we cover your street.
Book Your CGI Service in Lake Forest Today
One contractor, every system. Start from square one, build it right. Call (877) 688-9930 to schedule your free estimate and get a written line-item quote before the first nail goes in.
Written by Brent Calloway, Owner & General Contractor at Square One Builders, serving Lake Forest since 1998.