







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Key Biscayne
Hiring a general contractor in Key Biscayne comes with a set of challenges you won’t find across the causeway. This is a barrier island with hurricane codes, FEMA elevation requirements, salt air, and a housing stock that ranges from 1960s concrete bungalows to glass-walled high-rises on Crandon Boulevard. Our General Contractor team manages the whole job: permits, structural work, finish carpentry, and the long-lead material orders that decide whether your remodel finishes in five months or nine. If you’re planning a kitchen, bath, or whole-home remodel on the island, call (850) 988-7559 and we’ll give you a written price before any work starts.
Why Penhallow Remodeling Miami Is Key Biscayne’s Preferred General Contractor Company

Trevor Nash built Penhallow Remodeling around a simple promise: the price and the guarantee go in writing before a single cabinet is pulled. On Key Biscayne, that matters more than most places, because the variables are real: wind-load ratings, elevation certificates, condo board approvals, and millwork lead times that stretch into months. We don’t hand you a verbal ballpark and hope it holds. We hand you a fixed number, a defined arrival window, and a 365-Day Done Right Promise that says if something fails inside a year, we come back and fix it at no charge.
Our crews know the island. They know the difference between a 1950s concrete condo off Crandon Boulevard and a new piling-supported estate near the Cape. They know which window packages pass Miami-Dade wind-load review and which ones get kicked back. And when you call us, a live person answers, not a voicemail maze. Scheduling for Key Biscayne is coordinated from our Miami (South FL) office, with uniformed, background-checked technicians dispatched locally.
Styles & brands we work with







Licensed General Contractor in Key Biscayne
A Licensed General Contractor in Key Biscayne is the person who pulls the permits, schedules the inspections, and answers to the village when something doesn’t meet code. On this island, that job is heavier than most homeowners expect. The village requires elevation documentation on many rebuilds, impact-rated glass on new openings, and structural sign-offs before drywall goes up. We handle all of it, including the FEMA elevation certificate paperwork that often stalls projects when it’s left to the homeowner. A bathroom remodel with a walk-in shower typically runs $9,000 – $28,000 on the island. A kitchen remodel runs $14,000 – $45,000 depending on cabinet line, countertop material, and how much structural work the existing space demands.
Permit and Elevation Coordination
Finished floor heights on Key Biscayne often need to sit 7 – 9 feet above sea level, which means pilings, stem walls, or elevated slabs long before finish work begins. We coordinate the engineer, the surveyor, and the village permit office so your project doesn’t stall waiting on a signature.
Fixed-Price Contracts for Island Work
Every job gets a written line-item quote before we order a single sheet of drywall. Allowances are priced up front, not discovered mid-job. If the structural engineer flags a shear wall or a failed lintel during demo, you’ll see the adjustment in writing before we proceed, not as a surprise at the end.
Residential General Contractor in Key Biscayne

A Residential General Contractor in Key Biscayne does more than swing a hammer. We’re ordering custom cabinetry with 16-week lead times, coordinating with your architect or designer, and sequencing trades so the tile setter isn’t waiting on the electrician. On high-end island remodels, the schedule is driven by long-lead materials, not labor. Cambria quartz countertops, custom millwork, and impact-rated windows all take months to arrive. If they’re ordered after demo, the project stalls. We order them before we open a wall.
Designer and Architect Coordination
Most of our Key Biscayne projects involve a designer or architect, and we work inside that relationship rather than around it. We review drawings for buildability, flag lead-time issues early, and keep a single point of contact so you’re not chasing three people for answers.
Custom Millwork and Specialty Finishes
Key Biscayne homes lean into custom: floating vanities, glass railings, built-in cabinetry, stone feature walls. These are the pieces that make the project feel like yours. They’re also the pieces with the longest lead times. We carry fixed allowances for them in the written price so there’s no ambiguity when the samples come back.
Trusted Brands We Service in Key Biscayne
We install and service products from GAF, CertainTeed, and Owens Corning, along with kitchen and bath lines like KraftMaid, Wellborn, Cambria, Silestone, Kohler, and Moen. For Key Biscayne’s salt-air environment, we favor corrosion-resistant hardware and high-wind-rated systems. Because we stock common parts and coordinate delivery from local suppliers, turnaround on change items stays tight even when a specific finish has to be special-ordered.
Common General Contractor Problems We See in Key Biscayne Homes
- Single-pane jalousie windows that fail wind-load review. Many older condos along Crandon Boulevard still have original aluminum frames and louvered glass. When you open a wall during a bathroom or kitchen remodel, the inspector often requires those openings to be upgraded to impact-rated units. That’s an $8,000 – $25,000 line item if it’s not planned for.
- Custom millwork ordered after demo. On Key Biscayne, lead times of 16 – 24 weeks are common for custom cabinetry and architectural glass. If the order doesn’t go in before demolition, the project sits half-finished while the budget keeps carrying carrying costs.
- Elevation certificates that weren’t pulled early. Base flood elevation on the island can require finished floors 7 – 9 feet above sea level. If the surveyor and engineer aren’t engaged before design locks, you can lose weeks waiting on FEMA sign-offs.
- Untested concrete and failed lintels in 1950s – 70s buildings. Original window lintels and tie-downs in older concrete condos often fail wind-load analysis. We test early and price repairs into the written quote rather than springing them on you after demo.
See the difference
Before
After
Before
After
Before
AfterPricing for General Contractor in Key Biscayne, FL
Here’s what we quote for common Key Biscayne scopes. These are market-calibrated ranges, not bait numbers.
| Project | Typical Range (Key Biscayne) |
|---|---|
| Impact Window Installation | $8,000 – $25,000 |
| Shower Replacement | $3,000 – $8,500 |
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| Countertop Installation | $2,000 – $6,500 |
What moves the number: structural scope, elevation requirements, window package, and material grade. A small bathroom with a tub-to-shower conversion starts near $3,500 – $10,000. A full kitchen with custom cabinetry and Cambria tops can push past $40,000. Call (850) 988-7559 for a written quote. Estimates are free, and the number we give you is the number on the invoice.
We Also Serve Cities Near Key Biscayne
Our crews serve Key Biscayne and the surrounding South Florida communities, including Miami, Hialeah, and North Miami Beach. If you’re across the bridge or up the coast, the same written-price promise applies. Call us and we’ll schedule a walkthrough.
Serving Key Biscayne, FL - Our Local Coverage Area
We’re based in the Key Biscayne 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 Key Biscayne
On Key Biscayne, you’ll typically need a rough-in inspection for electrical, plumbing, and mechanical, plus a structural inspection for any shear walls, tie-downs, or elevated foundation work. If the project touches the building envelope or sits in a flood zone, expect a FEMA elevation certificate review and possibly a wind-load compliance check before the inspector signs off on drywall. We schedule all of these and adjust the sequence so inspections don’t idle the crew. Call (850) 988-7559 and we’ll walk you through the inspection path for your specific project.
If your home is in a floodplain or you’re pulling permits for structural changes, the village may require the finished floor to sit well above sea level, which can mean pilings or stem walls even on a interior remodel. If the work triggers an elevation review, that line item is mandatory, not optional. We only add it when the site survey and elevation certificate show it’s required. Call (850) 988-7559 for a written breakdown of your quote.
It depends on what the remodel touches. If you’re not altering the window openings or exterior envelope, you can often keep them. But if you’re replacing the window in the bathroom itself or opening a wall that includes the window frame, the inspector will likely require an impact-rated unit that meets current wind-load code. We check this before the quote is written, so there’s no post-demo surprise. Call (850) 988-7559 and we’ll review your condo’s specific situation.
Figure 16 – 24 weeks from approved shop drawings to delivery. Custom cabinetry and architectural glass for high-rise remodels on Key Biscayne routinely run that long. We order the millwork before demolition so the lead time runs concurrent with framing, rough-in, and drywall. That’s how we keep your project on schedule instead of stalled. Call (850) 988-7559 to see a realistic timeline for your scope.
It means the allowance for cabinetry, countertops, windows, tile, and fixtures is set in the contract before we place a single purchase order. If quartz goes up in price after contract signing, that’s on us, not you. The number you approve is the number you pay, and the 365-Day Done Right Promise covers the workmanship for a full year afterward. Call (850) 988-7559 and we’ll put your project in writing before you spend a dollar.
Ready to Talk About Your Key Biscayne Project?

Call (850) 988-7559 to schedule a free walkthrough and written quote. Trevor Nash and the Penhallow Remodeling Miami team serve Key Biscayne homeowners with fixed pricing, defined arrival windows, and a 365-day guarantee on every job. A live person answers when you call. No pressure, no vague numbers, just a written price and a promise we’ll stand behind.
Written by Trevor Nash, Owner at Penhallow Remodeling Miami, serving Key Biscayne homeowners with written pricing and the Kingswell guarantee since 2004.











