







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Bonita
Most Bonita homeowners call us after a first bid fell apart. The price changed at demo day, or the contractor never pulled permits, or the crew stopped showing up halfway through. That frustration is exactly what we built Penhallow Remodeling San Diego to fix. We serve Bonita with written pricing before any work starts, background-checked crews in uniform, and a 365-Day Done Right Promise in writing on every project. Call (619) 604-9624 and you’ll reach a live person, not a voicemail maze.
Why Penhallow Remodeling San Diego Is Bonita’s Preferred General Contractor Company

Bonita homeowners tell us the same story again and again. They got a verbal estimate, the work started, and the invoice didn’t match the conversation. That’s why our General Contractor team puts the number in writing before the first cabinet gets pulled. Trevor Nash, who leads Penhallow Remodeling San Diego, explains what “substrate” means in plain English and tells you what the guarantee covers in the same breath. No jargon left unexplained, no pressure applied.
We work under the Kingswell standard, in place since 2004: a written price up front, a defined arrival window, a clean job site, and a written guarantee on every project. If something fails inside 365 days, we come back and fix it at no charge. That’s not a slogan. It’s a line item in every contract we write for homeowners in Bonita.
Reviews from Bonita customers tend to mention the same things: the price didn’t move, the crew showed up when we said they would, and the site was clean when we left. That consistency comes from process, not luck. Every technician is background-checked and uniformed. A live person answers the phone 24/7. And the materials we install, from Cambria quartz to Kohler fixtures, carry their own warranties that layer on top of ours.
Styles & brands we work with







Residential General Contractor in Bonita
A residential General Contractor in Bonita is the single point of responsibility for a remodel, addition, or full-home renovation. You need one the moment a project involves structural changes, plumbing relocations, electrical work, or anything that requires a building permit. In Bonita, that typically means Kitchen Remodeling in Bonita runs between $14,000 and $45,000, a bathroom remodel between $9,000 and $28,000, or a home addition from $45,000 up to $130,000 depending on foundation work and square footage.
Bonita’s housing stock runs heavily toward 1960s through 1980s ranch and Mediterranean-style homes. Most have original wood framing, stucco exteriors, and flat or low-slope roofs. That changes how we approach nearly every project. A load-bearing wall removal in a 1972 rancher off Sweetwater Road requires different seismic detailing than the same job in a newer Chula Vista tract home.
Permits, Soil Testing, and Clay
Bonita sits on expansive clay, the local adobe soil, that swells and shrinks with moisture. Any addition or ADU here needs soil testing and deeper footings than a coastal contractor would ever specify. We include that documentation in the permit set from day one. Skipping it saves money for about one wet season, then the stucco cracks.
What a Compliant Quote Includes
A real Bonita quote includes wind-load rated framing, drainage details, permit fees, and inspection scheduling. We don’t bury those as “change orders” later. If a number appears on your written quote, that number holds through the final invoice. Trevor Nash signs that quote before we ask you to sign anything.
Hire a General Contractor in Bonita

You hire a General Contractor in Bonita when the job spans multiple trades, touches the structure, or changes the footprint of your home. A kitchen remodel that moves plumbing, a garage conversion for an ADU, or a load-bearing wall removal all require someone who can coordinate framing, electrical, plumbing, and inspections under one permit. In Bonita, a garage conversion typically runs $30,000 to $80,000, while ADU construction lands between $90,000 and $220,000 once clay-soil foundation and drainage work are included.
What should give you pause is a contractor who doesn’t mention soil at all. Bonita’s expansive clay has been heaving foundations and cracking stucco for decades. A competent local GC knows to test before pouring. A less careful one finds out after the first winter.
What Trevor Nash Looks For First
Trevor walks every Bonita site with drainage on his mind. Where does water pool? Where do the downspouts discharge? How old are the original galvanized supply lines? Those observations shape the scope before the first cabinet is ordered, and they’re reflected in the written price you receive.
Wind-Load Compliance That Matters Later
Bonita’s inland valley gets gusts that coastal cities don’t experience the same way, especially when a Santa Ana blows through. Roof tie-downs, window ratings, and framing details have to match actual exposure for your address. We spec products from PGT, CGI, and Boral where wind-borne debris ratings matter, and the permit documentation follows the work to your insurance file.
Trusted Brands We Service in Bonita
We install products from PGT and CGI for impact-rated windows and doors, and Boral roofing materials when wind-rated underlayment and tie-downs are required on a Bonita roof replacement. We keep relationships with local supply houses that stock these products for Bonita jobs, which shortens lead times on window packages and roof materials. If a specific product is backordered, you’ll know before you sign, not after demo day. The brands behind our work carry their own manufacturer warranties, layered on top of our 365-Day Done Right Promise. You get two written guarantees for the price of one.
See the difference
Before
After
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After
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AfterCommon General Contractor Problems We See in Bonita Homes
- Expansive clay heaving foundations. Bonita’s adobe soil can swell over 10% with moisture changes, lifting additions and cracking stucco within two wet seasons. The fix requires soil testing, deeper footings, and perimeter drainage specified before the concrete pour.
- Undersized wind-uplift details copied from coastal jobs. A contractor used to Chula Vista specs may under-rate a flat-roof ranch in Bonita, leaving tie-downs that fail when a Santa Ana hits. Current code requires exposure-specific anchoring, and cheaper quotes often leave the upgraded hardware out entirely.
- Corroding galvanized supply lines left inside finished walls. Original steel water lines in 1960s and 1970s Bonita homes are pinhole-leaking behind the drywall. Leave them in place during a kitchen remodel and you’ll be cutting fresh drywall open for an emergency repipe within months.
- Missing drainage corrections before remodels. Bonita’s seasonal rains expose drainage failures quickly. If new hardscape or an addition doesn’t account for where water goes, mold remediation and foundation repair follow the first wet winter.
Pricing for General Contractor in Bonita, CA
Here are the line-item ranges we quote in Bonita, based on current market conditions for this inland valley. These are written numbers, not verbal ballparks.
| Project | Bonita Price Range |
|---|---|
| Home Addition (permits, foundation, wind-load rated framing) | $45,000 – $130,000 |
| ADU Construction (including clay-soil foundation and drainage) | $90,000 – $220,000 |
| Roof Replacement (with Bonita wind-rated underlayment and tie-downs) | $8,000 – $20,000 |
| Impact Window Installation (wind-borne debris rating, insurance discount) | $8,000 – $25,000 |
What moves a Bonita number up or down? Foundation conditions from that expansive clay, seismic retrofit scope on older framing, and whether original galvanized plumbing needs replacing while the walls are open. We give you a free, written estimate after walking the property. Call (619) 604-9624 and we’ll schedule that walk with Trevor Nash personally.
We Also Serve Cities Near Bonita
Our crews serve Bonita and the surrounding communities. If you’re in Bonita, you’re already in our core service area. We also take on select projects in Chula Vista, La Mesa, Imperial Beach, and San Diego when the scope matches our remodeling focus and we can schedule the written estimate within a reasonable window.
Serving Bonita, CA - Our Local Coverage Area
We’re based in the Bonita 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 General Contractor in Bonita
Bonita sits in an inland valley exposure that current San Diego County code ties to a 3-second gust design speed, and your specific rating depends on your parcel’s wind zone, roof shape, and proximity to open terrain. A 1970s flat-roof ranch generally needs upgraded tie-downs, underlayment, and framing anchors to meet today’s wind-load requirements. Our quotes include the specific hardware and documentation your inspector will ask for. Call (619) 604-9624 for an exact assessment of your roof’s current rating.
Yes, documented wind-load and seismic compliance gives your insurance carrier written proof that the work meets current code, and some carriers apply premium discounts for impact-rated windows and updated roof tie-downs. The paperwork matters as much as the hardware. We file the completed permit set with your closing documents. Call (619) 604-9624 and we’ll explain exactly what your project file will contain.
Most low-bid Bonita kitchen quotes omit soil-stability documentation, seismic tie-down upgrades, galvanized pipe replacement, permit fees, and wind-rated framing details. When those appear later as change orders, the cheap quote becomes expensive. A compliant quote includes them line-by-line from day one. Call (619) 604-9624 for a written quote that accounts for all of it.
Expansive clay typically requires a geotech report, soil testing, and deeper footings before the city will sign off on a garage conversion ADU in Bonita. Drainage corrections usually get added to the same permit set. We handle the entire documentation chain so your permit moves without stalls. Call (619) 604-9624 and we’ll walk your property to assess what your ADU will need.
Replace original galvanized supply lines any time the walls are already open, because Bonita homes from the 1960s and 1970s commonly have steel pipes corroded to pinhole leaks that will fail after drywall closes. We repiped a 1970s rancher off Sweetwater Road in copper before rough-in inspection and documented the work on the same permit set. Call (619) 604-9624 and we’ll inspect your lines as part of the free estimate.
Written by Trevor Nash, Owner at Penhallow Remodeling San Diego, serving Bonita under the Kingswell standard since 2004.











