Labor Cost to Replace Exterior Door: Rates

The labor cost to replace exterior door units runs $150 to $700 for the common cases, and the spread comes down to one distinction most homeowners don’t know exists: swapping a slab versus installing a prehung unit. Quoting a labor cost to replace exterior door without knowing which job you’re buying is how people get surprised bills, because a slab swap is a 2 to 3 hour trim-and-hang job while a prehung replacement is a half-day tear-out that can uncover rot, out-of-square framing, and flashing sins from 1987. Here’s how the labor pricing actually works, straight from the estimating side of the business.

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The Two Jobs: Slab Swap vs. Prehung Replacement

A slab swap keeps your existing frame, hinges, and threshold and replaces only the door panel itself. The carpenter mortises hinges to match (or matches existing mortises), bores the lockset if needed, trims the slab to fit the old opening, and hangs it. Labor: $100 to $250, roughly 1.5 to 3 hours. It only works when the existing frame is square, solid, and weather-tight — which, on a 30-year-old entry, is a real “if.”

A prehung replacement tears out the entire unit — door, frame, threshold, casing — down to the rough opening, then sets a factory-hung door-and-frame unit: shimming plumb and square, fastening through the jambs, flashing the sill, insulating the gaps, and re-installing interior and exterior trim. Labor: $250 to $700 for a standard single door, typically 3 to 6 hours for a clean opening. Prehung is the right call whenever the frame is rotted, racked, drafty, or you’re changing door size or swing.

Typical Labor Rates by Job Type

• Slab swap, existing hardware locations match: $100–$200
• Slab swap requiring new mortises and lockset bore: $150–$275
• Prehung single entry door (36 x 80), clean opening: $250–$500
• Prehung with sidelites or 42-inch-plus units: $400–$800
• Double/French exterior doors: $500–$1,000
• Sliding patio door replacement: $300–$700
• Storm door add-on while on site: $100–$200

Big-box installed programs (Home Depot, Lowe’s) quote all-in packages where labor effectively lands at $300 to $600 for a prehung entry — convenient, middle-of-market pricing, subcontracted crews of variable quality. An independent finish carpenter at $60 to $100 per hour often beats them on quality at the same or slightly higher price.

Regional Ranges: Where You Live Moves the Number

Labor tracks local carpenter wages and demand. Rough multipliers on the national midpoint ($350 to $450 for a prehung install):

• Rural South and Midwest: 0.7–0.85x — prehung installs commonly $250–$375
• Average metro markets (Phoenix, Charlotte, Columbus): 0.9–1.1x — $325–$500
• High-cost coasts (NYC metro, Boston, Bay Area, Seattle): 1.3–1.8x — $450–$800 for the identical door
• Resort and island markets: 1.5–2x, plus trip charges

Minimum service charges also bite small jobs: many contractors won’t roll a truck for under $250 to $350, which is why a $150 slab swap often gets quoted at $300 — you’re paying the floor, not the hours. Bundling helps: two doors done in one visit typically prices at 1.6x one door, not 2x.

The Hourly Math Behind a Quote

Decode a $475 prehung labor quote and it stops looking arbitrary. A competent installer bills $60 to $100 per hour (or the company bills $90 to $140 with overhead). The clean-opening sequence: tear-out and haul-away, 45 to 60 minutes; check and prep the rough opening, 30 minutes; set, shim, and fasten the unit plumb-square-level, 60 to 90 minutes; sill pan and flashing tape, 20 to 30 minutes; low-expansion foam, casing inside and out, caulk, hardware, and adjustment, 60 to 90 minutes. That’s 4 to 5 hours of skilled work plus consumables (shims, foam, flashing tape, caulk — $30 to $50) and disposal. At $90 per hour, $475 is a fair, unremarkable price. Quotes far below that usually mean steps are getting skipped, and the skipped step is always flashing — the one you can’t see and the one that rots the next frame.

What Adds Hours: The Surprise Multipliers

Every experienced installer pads exterior-door estimates mentally for these, and now you’ll know why:

1. Rot in the subfloor or rim joist under the threshold. The most common surprise. Water has been sneaking past a bad sill for years; the installer opens the threshold and finds punky wood. Sistering framing and patching subfloor adds 1 to 4 hours and $100 to $600. In bad cases (structural rim repair), it becomes a separate $1,000-plus repair before the door can even set.
2. Out-of-square and out-of-plumb openings. Old houses settle. An opening racked more than about 3/8 inch means aggressive shimming, planing, sometimes reframing a side — add 1 to 2 hours ($75 to $200). The tell during the estimate: the old door’s reveal is wedge-shaped or it drags at one corner.
3. Size mismatches. Older homes have 32 x 79 or odd-height openings; today’s stock doors are 36 x 80. Reframing an opening wider or taller runs $200 to $500 extra; custom-size doors avoid the carpentry but add weeks and material cost.
4. Masonry and stucco openings. Fastening into brick or cutting stucco cleanly for new casing adds an hour-plus and specialty fasteners: $100 to $300.
5. Smart locks, multipoint hardware, and re-keying: 30 to 60 minutes; $50 to $150.
6. Lead paint (pre-1978 homes). EPA RRP-certified practices on the tear-out add containment time and $75 to $200 to a legitimate quote.

What a Good Labor Quote Should Include

Get it itemized. A complete prehung labor scope covers: removal and disposal of the old unit, inspection of the rough opening with a stated hourly or unit rate for rot repair if found, sill pan or flashing tape at the sill (ask specifically — “how do you flash the sill?” is the single best contractor-screening question in this trade), plumb/level/square set with shims at hinge and latch points, low-expansion foam or backer-rod-and-caulk perimeter sealing, interior and exterior trim reinstalled or replaced, hardware installation, and adjustment to an even reveal with smooth latching. Warranty on labor should be at least one year; the door itself carries the manufacturer’s warranty separately.

Timing and Booking: Small Levers That Cut the Bill

Door labor has a season. Carpenters and handyman services book solid from April through October; call in January or February and the same prehung install that quoted $475 in June often lands at $375 to $425, because winter calendars have holes and exterior doors are one of the few outdoor-adjacent jobs that install fine in cold weather (the foam and caulk just want to be above roughly 40°F, or stored warm). Supply the door yourself and you also dodge the 10 to 20 percent material markup many contractors add — though then transport damage is on you, and a prehung unit rides ugly in a short-bed pickup. Ask the installer to quote labor-only pricing both ways; the honest ones don’t care who buys the door.

Scope-stacking is the other lever. A carpenter already on site with tools out will often add a storm door, adjust two interior doors, or swap a deadbolt for $60 to $90 per task instead of separate-visit pricing. Walk the house before the appointment and build the punch list — the trip charge is already paid.

DIY vs. Paying the Labor

A slab swap is honest intermediate DIY: a router or sharp chisel for hinge mortises, patience, and a $0 labor bill. A prehung replacement is deceptively hard — the unit weighs 60 to 100 lb, and the difference between a door that latches with a fingertip for 20 years and one that drags every August is maybe 1/16 inch of shimming judgment. If you DIY it, budget a full day, buy a 6-foot level, and watch the reveal, not the bubble, as your final authority. But if your opening shows any rot, any racking, or brick surrounds, the $400 you pay a pro is the cheapest insurance in this project — because the second-most-expensive door install is the good one; the most expensive is the one done twice.