Premium entry, storm, French, and sliding door installation across Nassau and Suffolk — measured, delivered, installed, and cleaned up before the sun goes down. 2,800+ Long Island doors since 2011. Therma-Tru Certified. Andersen ProCertified.
No sales pitch. No "today only" nonsense. We measure your house, we give you a real number, you think about it.
Six quick questions. We'll call you back within 4 business hours. No sales pitch, ever.
Long Island door installation is all we do — no windows, no siding, no roofs. Every one of our nine crew members has run this one trade for years, which means the measurement is tight, the frame is square, and the weatherstrip seals on the first close. Whether you need a new long island door to replace a rotting 1970s wood slab on a Levittown colonial, a hurricane-rated front entry on a south-shore Bay Shore home, or long island doors throughout a full gut renovation in Garden City, we bring the same process: measure Monday, door on your house by Friday. We service every zip code in Nassau and Suffolk, and our showroom in Huntington Station carries full-size Therma-Tru and Andersen units on the floor so you can see the finish before you commit. After 2,800+ installs across both counties since 2011, we’ve seen every rough opening on the island — and we know how to fit it right.
Long Island homes come in every style — 1950s capes, 1960s ranches, center-hall colonials, and Victorian-era Oyster Bay Victorians. Each one has different rough openings, different framing conditions, and different curb-appeal expectations. We match the door to the house, not the other way around.
Door installation on Long Island covers everything from a single interior bedroom door in a Hempstead colonial to a full exterior entry replacement with sidelights in Cold Spring Harbor. Long Island Door Co. has completed 2,800+ installs across Nassau and Suffolk since 2011 — every town, every door type, one-day turnaround.
We hold Nassau HIC #H2808970000 and Suffolk HIC #52117-H, so we pull permits in either county. Like-for-like exterior replacements almost never need a permit. Structural changes, sidelights, or enlarged openings do — we handle the filing and inspection in all Nassau and Suffolk towns.
We install the full range Long Island homeowners need: Therma-Tru and Andersen entry doors, interior bedroom and closet doors from Hempstead to Huntington, French doors for patio openings, and Andersen sliding glass replacements across Suffolk. No national call center, no subcontractors, no open hole overnight.
Installed pricing
Includes labor, materials, haul-away & 10-yr warranty
Common replacements we handle
Credentials
Long Island door installation follows a five-step process we have refined across 2,800+ jobs in Nassau and Suffolk. Every step is designed to get you from first call to finished door in the shortest time possible — most jobs wrap in a single day.
Tell us your address and what you need — entry, storm, French, sliding, interior, or all of the above. We schedule a free measurement visit within 2 to 3 business days.
James or a crew lead measures the rough opening, checks for rot or framing issues, and walks you through Therma-Tru and Andersen options that fit your house and budget.
You receive a line-item written quote within 24 hours. The price includes the door, hardware, labor, weatherstrip, caulk, and cleanup. No surprises, no upselling.
Our crew arrives at 7:30 AM, removes the old door, preps the rough opening, hangs the new unit level and plumb, installs trim and hardware, caulks, and cleans up — before dinner.
We test every lock and seal, walk you through care instructions, and activate the 10-year workmanship warranty plus the manufacturer lifetime warranty. Done.
Guaranteed. Most door complaints online start with "they never showed up." That will not happen here. If you would rather talk to a human than fill out a form, here is the number.
Every one of these is a Long Island house where we replaced the door. The "before" shot is the day we pulled up. The "after" is the day we drove away. No staging, no filters.
Style, material, color. Three clicks, one preview, a real installed-price range. Most homeowners land on a final choice in under 90 seconds. It’s the closest thing to walking our showroom without getting off the couch.
Measured, delivered, installed & cleaned up — before sundown.
Three door shapes cover roughly 90% of Long Island homes. Pick the one that reads closest to yours.
If you pick a stock Therma-Tru or Andersen unit, the door is on your house in a single day. No "we'll be back Thursday." No open hole in your house overnight.
We don't do windows. We don't do doors. We don't do roofs. We do doors. A crew on its 2,800th install works differently from one on its 50th, and you'll see it in the caulk line.
We are Therma-Tru Certified Installers and Andersen ProCertified Contractors — the manufacturers actually audit our work. Fewer than 3% of LI door installers carry both.
Nassau HIC #H2808970000. Suffolk HIC #52117-H. $2,000,000 liability. Workers comp on every crew member. BBB A+ Accredited. EPA Lead-Safe.
No AI on our site. No call center. Call between 7am and 6pm Monday through Saturday and you get Dana in the showroom or James in the truck. Nights and weekends, we call back in the morning.
Most door installers work out of a pickup. We run a real showroom on Broadway in Huntington Station — two rows of full-size Therma-Tru and Andersen units, hardware samples, stain swatches. Saturdays by appointment.
“James came out Monday, measured, showed me three Therma-Tru samples. They were back Friday at 7:30 and by 3 PM my old steel door was gone and a new fiberglass in its place. Crew was spotless. Feels like a different house.”
“We had a 1970s front door that was warped shut every winter. Long Island Door Co. got us a Therma-Tru Fiber-Classic in mahogany, installed in one day, and it matches our shutters perfectly. Zero drafts now.”
“20-year-old patio slider finally gave up. LI Door Co. had the Andersen replacement in stock, installed in under 7 hours. The new one slides like butter. Crew was polite and cleaned up every speck.”
We started installing long island doors in 2011 out of a single truck. Today we run three crews, a Huntington Station showroom, and a track record of 2,800+ completed door installations across Nassau and Suffolk. Every credential below is current, verified, and on file.
Long Island Door Co., LLC · 284 Broadway, Huntington Station, NY 11746 · Serving Nassau and Suffolk since 2011 · Our showroom is open Mon–Sat 7am–6pm. Contact us or visit in person — no appointment needed weekdays.
Our shop is on Old Country Road in Hicksville, smack in the middle of the island, so no address on Long Island is more than an hour from our front door.
Every other door website makes you fill out a form and wait. We built actual calculators so you can see a real ballpark and visualize the finish before you even call us.
Long Island door installation is not the same job as door installation in Phoenix or Atlanta. Salt air off the Great South Bay and Long Island Sound, freeze-thaw cycles every November through March, and nor’easter wind loads exceeding 80 mph on south-facing facades put specific demands on materials, weatherstrip, and installation technique that most national box-store door crews are not set up for.
Nassau County homes are predominantly pre-war through 1970s construction: Cape Cods in Levittown and Hicksville, brick colonials in Garden City and Manhasset, and ranch-style splits in Merrick and Plainview. Each era has its own rough-opening dimensions, framing lumber sizes, and exterior trim profiles. We have been measuring and fitting doors in Nassau County homes since 2011. We know what a 32-inch rough opening in a post-war Levittown looks like when it has been painted shut six times.
South-shore towns from Babylon through Bellport see tidal surges — homes within a mile of the water increasingly specify impact-rated fiberglass doors with laminated glass lites rated to Miami-Dade standards. East End historic districts in Southold, Southampton, and East Hampton require matching original millwork profiles and often coordinating with the local architectural review board on exterior finish colors. We handle permit applications and board submittals in both situations routinely.
Using standard residential weatherstrip on coastal homes. Salt spray degrades vinyl bulb-seal in one season. We use marine-grade bulb-seal on every coastal install, and we check the threshold sweep for full-contact compression before leaving the job. Our 10-year workmanship warranty covers exactly that failure mode.
3 questions to ask any Long Island door contractor:
Long Island Door Co. answers yes to all three. See our credentials.
Service area facts
Post-war capes, brick colonials, split-levels. Every town, every building dept.
Nassau service areaAll 10 townships. Coastal impact doors, East End historic districts.
Suffolk service areaNot all door installers are created equal. Here is the short list of things that actually matter when you are choosing a company to replace your front door — and how Long Island Door Co. stacks up.
We carry Therma-Tru Certified Installer and Andersen ProCertified Contractor status. Fewer than 3% of Long Island door companies hold dual certification — and it is what keeps the full manufacturer warranty intact on every install.
Many door companies work with a single-county license or none at all. We hold active Home Improvement Contractor licenses in both Nassau and Suffolk, plus $2M in general liability and workers comp on every crew.
Most competitors show you a catalog. We have a physical showroom in Huntington Station with full-size Therma-Tru and Andersen doors on display — so you can see, touch, and compare before you decide.
The biggest complaint about door companies online is delays. We stock the most popular Therma-Tru and Andersen units locally, so if you pick one of those, the door is on your house in a single day.
We publish real price ranges on our website and provide a fixed written quote at the measurement visit. No "starting from" bait-and-switch. No pressure to sign on the spot.
On top of the manufacturer lifetime warranty, we back our own labor with a 10-year written workmanship warranty. If it fails because of how we installed it, we come back and fix it free.
What does door installation on Long Island actually cost? Here are our installed price ranges for every door type — including the door, hardware, installation labor, weatherstrip, caulk, and cleanup. No hidden fees.
| Door Type | Installed Price | Install Time |
|---|---|---|
| Storm door installation | $600 – $1,400 | 2–4 hours |
| Steel entry door | $1,800 – $3,400 | 4–6 hours |
| Fiberglass entry door (Therma-Tru) | $2,800 – $5,800 | 4–8 hours |
| French door installation | $2,400 – $6,800 | 6–8 hours |
| Sliding glass patio door | $2,200 – $7,200 | 4–8 hours |
| Interior door (per door) | $350–$800 | 1–2 hours |
Prices reflect installed cost on Long Island in 2026 including door, hardware, installation labor, weatherstrip, and cleanup. Sidelights, transoms, and structural changes are quoted separately. See full pricing guide.
Long Island Door Co. handles closet door installation across all of Nassau County NY — bifold closet doors, sliding bypass closets, hinged panel doors, and barn-style sliders. Whether you are updating a bedroom closet in Hempstead, replacing worn bifolds in a Levittown cape, or fitting new bypass doors in a Garden City colonial, our crew measures, supplies, and installs in a single visit. Closet door installation in Nassau County NY does not require a permit for standard rough openings. We match existing millwork and supply hardware in brushed nickel, matte black, and satin brass to coordinate with the room. Schedule a measurement visit.
For homeowners who want something beyond the catalog, Long Island Door Co. sources and installs custom doors on Long Island through direct factory relationships with Therma-Tru, Andersen, and Pella. Custom doors on Long Island include oversized pivot entries, carved wood slabs, doors with bespoke glass patterns, and impact-rated units for south-shore flood zones in Babylon, Bay Shore, and Long Beach. Custom orders typically take 2 to 4 weeks for factory production, then install in a single day. We pull Nassau and Suffolk permits for any structural framing changes and manage the full process from initial measurement to final walkthrough. Get a custom door estimate.
Every one of these is a real question we hear weekly on the phone, in walk-throughs, or at Home Depot on a Saturday morning. No corporate hedging, just the answer.
See all 30+ FAQsLong Island doors face specific challenges that mainland showrooms rarely address: salt air corrosion within a mile of the Sound or Atlantic, freeze-thaw cycling that destroys wood swelling, and building code requirements in every Nassau and Suffolk town. Our Huntington Station showroom carries two full rows of Long Island doors from Therma-Tru and Andersen — fiberglass, steel, and real-wood units you can actually touch and compare before committing. Among Long Island doors, Therma-Tru Fiber-Classic fiberglass is the most requested for colonial and cape cod homes because it handles salt air and humidity without swelling, warping, or repainting. Andersen 400-series is the benchmark for patio sliders and French doors. For south shore homes in flood-designated zones (Long Beach, Lindenhurst, Bay Shore, Babylon), we carry impact-rated Long Island doors with laminated glass lites and marine-grade weatherstrip. Every door we sell comes with factory-certified installation — Therma-Tru Certified and Andersen ProCertified — which activates the extended manufacturer warranty. Nassau HIC #H2808970000, Suffolk HIC #52117-H.
Town of Hempstead
Hempstead, Garden City, Levittown, Massapequa, Uniondale, Valley Stream
Town of Oyster Bay
Hicksville, Bethpage, Plainview, Syosset, Woodbury, Oyster Bay hamlet
Town of North Hempstead
Manhasset, Port Washington, Great Neck, Roslyn, New Hyde Park
Like-for-like replacement is permit-exempt in all three Nassau towns — the most common job we do here. Permit required only when widening the opening, adding sidelights, or converting to a double-door configuration (7–10 business days; we handle all filings).
Nassau County front door considerations
South Shore coastal towns
Massapequa, Merrick, Bellmore, Wantagh, Long Beach — we spec fiberglass over steel here. Steel corrodes at accelerated rates in salt-air exposure even with diligent paint maintenance.
Brick & masonry facades
Garden City, Manhasset, and Great Neck homes require masonry anchoring for the door frame. Many local companies subcontract this — we do it in-house.
Pre-1978 homes
Any disturbing of existing painted trim during door replacement requires an EPA Lead-Safe certified contractor in Nassau County. We carry that certification.
| Factor | Fiberglass | Steel | Wood |
|---|---|---|---|
| LI installed cost (basic) | $1,800 – $3,200 | $1,200 – $2,400 | $3,500 – $7,500 |
| Salt air resistance | Excellent — best coastal choice | Fair — corrodes w/o regular paint | Fair — requires annual sealing |
| Insulation (R-value) | R-5 to R-7 | R-2 to R-5 | R-2 to R-3 |
| Maintenance (LI climate) | Very low — repaint every 15+ yrs | Medium — repaint every 5–7 yrs | High — repaint/seal every 2–3 yrs |
| Customization | High — can replicate wood grain | Medium — limited texture options | Highest — true custom millwork |
| Impact/security | Very good | Excellent — best security rating | Good (solid hardwood) |
| Best for | South Shore, coastal, low-maint | Interior-facing, garage doors | North Shore estates, historic districts |
| Warranty (typical) | Therma-Tru lifetime limited | Pella/Andersen 10-yr to lifetime | Varies by brand/custom work |
Prices are for a standard 36"×80" pre-hung entry door with basic hardware, frame, and installation in Nassau or Suffolk County. Sidelights, transoms, custom hardware, and structural framing changes are additional. Request a free estimate for your specific project.
Does a Nassau County HOA need to approve my door color?
Many Nassau County communities with active HOAs — particularly in Garden City, Roslyn Heights, and Plainview — do require HOA approval for exterior color changes. We can provide specification sheets and color samples in the format most HOA architectural review committees require. In most cases, changing to a color within the approved palette does not require a separate submittal.
What is the best front door for a house near the Great South Bay?
For homes in Wantagh, Seaford, Massapequa Park, Baldwin, and Oceanside — within a mile of the bay — we recommend Therma-Tru Fiber-Classic or Smooth-Star fiberglass over steel. Fiberglass resists salt-air corrosion far better than painted steel and requires significantly less maintenance on coastal exposures. We install marine-grade bulb-seal weatherstrip and a marine-grade threshold sweep on every coastal Nassau County door installation.
How much does a front door installation cost in Nassau County?
A like-for-like fiberglass front door installation in Nassau County — Therma-Tru Fiber-Classic or Smooth-Star, single pre-hung unit, standard hardware — runs $1,800–$3,200 installed, including our measurement visit, installation, weatherstrip, and 10-year workmanship warranty. Steel doors run $1,200–$2,400 installed. Custom wood entries run $3,500–$7,500+ depending on species and design. Prices confirmed in writing at the measurement visit.
Can you match the door profile on my 1950s Levittown cape?
Yes. We have fitted hundreds of doors on Levittown and Hicksville capes and know the stock profiles that match the original exterior trim. Modern pre-hung units from Therma-Tru and Andersen come in profiles that closely replicate the 3.5-inch colonial casing common on mid-century Nassau County homes. We bring samples to the measurement visit so you can see the profile match before ordering.
Do you install storm doors in Nassau County?
Yes. Storm doors are a popular add-on for Nassau County homes that want additional weather protection without replacing the primary door. We install Andersen and Larson storm doors in full-view, ventilating, and quick-change storm/screen configurations. Most storm door installs take less than half a day. Storm doors do not require permits in Nassau County when installed without structural modification.
Tell us your address and James will call you back within 4 business hours to schedule a walk-through. The estimate is free. The walk-through takes 30 minutes. There's no pitch at the end.
or fill out the form, it takes 20 seconds
Five fields. We take it from there.
Long Island Door Co. installs doors across all of Nassau and Suffolk County. Here are the ZIP codes we serve most frequently for door installation on Long Island.
Not seeing your ZIP? We cover every address on Long Island. Call us for door installation anywhere in Nassau or Suffolk County.
