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📌 Key Takeaway: A prehung exterior door typically costs $440-$1,800 installed, with labor alone at $280-$1,300. Sliding patio doors run $700-$6,200, and interior doors average $226-$824 installed.
Major Door Brands
Therma-Tru
A leading entry-door manufacturer, well known for fiberglass doors that mimic wood grain without the maintenance.
Pella
Offers a wide range including sliding and hinged patio doors, often with professional installation through its own network.
Andersen
Well known for patio doors and one of the leading storm door brands, with a broad retail presence.
Local Door Installers & Carpenters
A careful installer matters as much as the door itself — poor flashing and shimming cause drafts, sticking and water damage.
2026 Installed Price Snapshot
| Door Type | Typical Installed Cost |
|---|---|
| Prehung exterior door | $440-$1,800 |
| Slab exterior door (no frame) | $400-$1,700 |
| Entry door with sidelights (unit price) | $700-$4,100 + installation |
| Sliding patio door | $700-$6,200 |
| French doors | $550-$5,600 |
| Storm door | $270-$1,000 |
| Interior door | $226-$824 |
| New door opening in exterior wall | $1,400-$3,500 |
Prehung vs. Slab
A prehung door arrives already mounted in its frame with hinges — best when the old frame is damaged or out of square. A slab is just the door, hung on your existing frame; it can save money when the frame is solid but takes more fitting work.
Frequently Asked Questions
How long does it take to replace a front door?
A prehung replacement usually takes 2-4 hours of labor; fitting a slab can take 3-8 hours.
Does a new front door improve energy efficiency?
An insulated steel or fiberglass door with good weatherstripping can reduce drafts compared with an old, poorly sealed door. Look for ENERGY STAR-certified models.
Do I need a permit to replace a door?
Like-for-like replacements often don't, but new openings in exterior walls almost always do. Check with your local building department.