What custom windows and doors actually cost and how long they take in Marco Island
A true custom window or door package in Marco Island typically runs between $12,000 and $40,000 for a full home, with individual custom door units starting around $2,500 installed and complex window walls running $4,000 to $9,000 per opening. Most projects take four to eight weeks from templating to final walkthrough, though lead times on specialty glass and custom millwork can push that window. Call (844) 638-7249 for a written, line-item estimate specific to your home - it’s free and comes with no surprise change orders.
On Marco Island, custom means something different than it does ten miles inland. The salt air, the flood elevation codes, the Mackle-era CBS shells getting gutted and reimagined - every opening has to be measured against a coastal reality that stock off-the-shelf units simply were not designed for. Our Windows & Doors crew handles the full scope, from engineered shop drawings to final flashing and trim, so the assembly stands up to what this island throws at it.
How a custom windows and doors project unfolds in Marco Island
We start with a detailed site measure, not a rough tape job. A technician documents every rough opening, notes any settlement or racking in the existing framing (common in those 1970s CBS structures), and checks for rebar corrosion around the openings, which salt-laden air accelerates faster here than in Naples. That assessment takes about 90 minutes and gives us the hard numbers the shop drawings depend on.
From there, you sit down with our design consultant to choose materials, glass packages, hardware finishes, and any integrated smart features. This is the stage where most custom decisions get made: wood species, aluminum cladding color, tint level, impact rating, mullion profiles, and whether you want motorized shades pre-wired into the header. Plan on two to three hours for that meeting, and know that every selection has a direct line to the final price.
Once the order is placed - and lead times on custom units from mills and manufacturers run six to ten weeks depending on complexity - we pull permits with the City of Marco Island and, where applicable, coordinate with your HOA architectural review committee. On the island, the building department will want to see product approvals for wind zone and impact rating before they stamp the permit. We submit those with the application so the review does not stall.
Installation is methodical. One opening at a time, we remove the old unit, inspect and remediate the rough opening for any hidden water damage or corroded anchors, flash the sill with a marine-grade self-adhered membrane, set the new unit, shim and square it to within an eighth of an inch, and seal it with a fluid-applied flashing that can handle 180-mph wind-driven rain. A typical custom door takes a day; a large window wall can take two. We do not leave an opening unsealed overnight. The trim and interior casing go on last, after the sealant has cured.
Inspection happens in two stages if the job scope triggers it: rough-in inspection after flashing (before trim covers the perimeter), and final after all units are in and operating. The whole process, from first measure to final sign-off, typically spans five to eight weeks for a full custom package. That timeline accounts for the reality of Marco Island permitting, which can add a week or two during peak building season.
The options you will choose between
- Wood (mahogany, cypress, or vertical-grain fir) vs. aluminum-clad wood. Solid wood gives you the warmth and grain that high-end Marco Island homes demand, but it requires a diligent finishing schedule - salt air will find bare wood fast. Aluminum-clad exteriors eliminate that maintenance cycle entirely while keeping the wood interior look. Expect clad to add 20 to 30 percent to the unit cost.
- Impact glass packages. Collier County wind code is non-negotiable here. You will choose between laminated impact glass (heavier, thicker, true single-layer protection) and impact-rated insulated glass units that also carry a Low-E coating for solar heat gain. The insulated units cost more but cut your cooling load in a house that faces Gulf sun all afternoon.
- Custom door configurations: pivot, bi-fold, or multi-slide. Pivot doors make a statement on a Marco Island entryway, but they need a reinforced header and a floor socket that cannot settle - and on this island’s engineered fill, settlement is the variable that keeps structural engineers employed. Bi-fold and multi-slide doors open entire walls to a lanai or pool deck, and they need a continuous sill pan flashed into the slab with zero tolerance for low points where water can pond.
- Hardware and integration. We regularly spec multi-point locking systems on custom doors, soft-close tracks on sliding units, and pre-wired headers for motorized shades that tie into Lutron or Control4 systems. These decisions get locked in before the shop drawings go out, because retrofitting a motor into a built-up header after the fact doubles the labor.
What custom windows and doors cost in Marco Island, FL
A full-home custom window and door package on Marco Island lands between $12,000 and $40,000, with most of the 1,800-to-2,800-square-foot homes we work on falling in the $18,000 to $28,000 range. A single custom entry door, with sidelites and a transom, typically runs $4,500 to $9,500 installed. A large sliding or bi-fold door assembly - the kind that opens the living room to a screened pool enclosure - can run $7,000 to $15,000 per opening.
What moves the number: the number of openings obviously, but also the material grade. Mahogany costs more than vertical-grain fir. Impact-rated insulated glass costs more than laminated-only glass. A multi-slide door with a recessed floor track costs more than a surface-mounted track, because it means cutting and waterproofing a channel into the slab. If we discover corroded rebar or spalled concrete around an existing opening - and on a 1970s Mackle-era CBS house facing salt air for 50 years, we often do - the concrete repair adds $400 to $1,200 per opening before the new unit even goes in.
Permit fees on Marco Island run a few hundred dollars for a straightforward like-for-like custom replacement, but if the project changes the opening size or adds new openings, the permit scope expands and the fee climbs accordingly. Our written estimate spells out every line: materials, labor, permitting, flashing and sealant, trim and casing, and disposal of the old units. The number you approve is the number you pay. No change orders because we found something we should have caught during the site measure.
What Marco Island homes specifically do to this job
Marco Island’s housing stock was built largely between 1965 and 1985, single-story concrete block structures on slabs poured over dredged fill. Those original windows and doors were builder-grade aluminum single-pane units - undersized by today’s standards and utterly inadequate for current wind code. When we open up a rough opening on one of these homes, we regularly find corroded steel lintels, spalled concrete at the corners, and sill pans that were never flashed with anything more than a bead of caulk. That all has to get fixed before the new custom unit is set, and it is work a stock window replacement company will not touch.
The island’s salt-laden air is the silent variable in every project. It accelerates corrosion on uncoated fasteners, eats standard aluminum cladding if the finish is not a marine-grade coating, and finds every microscopic gap in a sealant bead. We use only 316-grade stainless steel fasteners on exterior trim and flashing, and we spec a fluid-applied flashing system rated for coastal high-wind zones. These are not upgrades we offer - they are the minimum we will install on a barrier island. Homeowners in neighborhoods near the Snook Inn or along Collier Boulevard often see the consequences of skipped steps: fogged insulated glass, swollen wood frames, and rust stains bleeding from window corners. Doing it right the first time is cheaper than fixing it in year five.
Then there is the teardown-and-rebuild reality. Marco Island is in a near-constant cycle of demoing those original Mackle-era vacation cottages and building two-story elevated custom homes in their place. On those projects, custom windows and doors are part of the larger architectural intent from day one, and the coordination runs through the architect and structural engineer. We are comfortable working inside that workflow - taking shop drawings, submitting product approvals to the building department, and hitting the rough-opening dimensions that an elevated pile foundation produces. It is a different job than retrofitting a 1974 rancher, and it demands a crew that has done both.
Many of these rebuilds happen as part of a larger exterior overhaul, and homeowners often pair custom window and door packages with Paver Driveways in Marco Island or Concrete Driveways & Concrete Work in Marco Island to bring the whole property up to the same standard. The full scope of the project may also touch on Windows & Doors in Marco Island when the conversation expands beyond the custom units themselves. We serve the full Marco Island area, from the 34140 ZIP up to the 34113 corridor, and we know the building department’s expectations well enough to keep the permit review moving.
Serving Marco Island, FL - Our Local Coverage Area
We’re based in the Marco Island area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently asked - Custom Windows & Doors in Marco Island
From the day we take site measurements to the day the final trim goes on, most projects on Marco Island span five to eight weeks. The biggest variable is the manufacturing lead time on the custom units, which runs six to ten weeks depending on the mill and the complexity of the order. Permitting with the City of Marco Island adds one to two weeks, longer if an HOA architectural review runs concurrently. We give you a schedule with hard dates before we order anything, so you know exactly when your openings will be sealed and finished.
Yes. The City of Marco Island requires a permit for window and door replacements, and the building department will ask for product approvals showing that the new units meet the current wind-zone and impact-rating requirements. We pull the permit as part of the project, submit the product approval documentation with the application, and handle both the rough-in and final inspections. Skipping the permit is not an option - it voids your homeowner’s insurance coverage on those openings and creates a disclosure problem when you sell.
You can, but it is structural work. Those 1960s-through-1980s concrete block homes have exterior walls that are load-bearing, and enlarging or adding an opening means cutting into the block, installing a new reinforced concrete lintel or steel I-beam header, and often adding vertical tie-downs to meet current wind code. That work requires an engineered drawing and a separate structural permit. It adds cost - typically $1,800 to $4,500 per opening depending on size - and about a week to the timeline. We tell you upfront whether the header modification is feasible or whether the existing opening size makes more sense.
A single custom impact-rated entry door, fabricated to your opening dimensions and finish specifications, typically costs $4,500 to $9,500 installed in Marco Island. That includes the door slab or door-with-sidelites assembly, the impact-rated glass, the multi-point locking hardware, the marine-grade flashing and sealant package, and the interior casing. The price climbs toward the high end when you add a transom, choose mahogany over vertical-grain fir, or need a pivot configuration that requires structural header reinforcement. Call (844) 638-7249 and we will give you a written quote based on your actual openings, not a ballpark.
The window and door manufacturers carry their own warranties on the units - typically 10 to 20 years on the glass seal and 10 years on the frame and hardware, depending on the brand. Our workmanship is covered by the 730-Day Done Right Promise: if something we installed is not right, we make it right, no deductible, no runaround. That covers the flashing, the anchoring, the trim, and the integration with your existing wall assembly. On Marco Island, where wind-driven rain and salt spray test every seal every season, that guarantee is the only kind worth having.
Get a free custom windows and doors estimate in Marco Island
If you are planning a custom window or door project on Marco Island - whether it is a single statement entry door or a full-home package on a teardown rebuild - call (844) 638-7249 to schedule a free on-site estimate. One of our technicians will walk the property, take precise measurements, talk through your material and finish options, and return a written, line-item quote that covers the complete scope. No pressure, no vague numbers, and a live person answers when you call.
Written by Derek Hollenbeck, Owner at Groundwork Construction Co., serving Marco Island homeowners since 2014.