Skylight Replacement Cost in Massachusetts (2026)

Replacing a skylight in Massachusetts in 2026 runs roughly $1,400 to $3,500 for a fixed deck-mount unit bundled into a reroof, $2,000 to $4,500 as a standalone job, and $3,500 to $7,500 for a venting or solar-powered unit once you add MA labor, ice-and-water shield, and interior finish. The tempting rebate story does not survive contact with the fine print: Mass Save's Windows Qualified Product List names windows, not skylights, so the $75-per-window rebate almost never lands on a skylight, and both federal tax credits that used to help (25C on efficient models, 25D on solar-powered units) expired for property placed in service after December 31, 2025. What's left is a well-priced quote and, if you're smart about the sequencing, a Mass Save weatherization rebate on the light-shaft insulation.

What does skylight replacement cost in Massachusetts in 2026?

Honest ranges, priced against Boston, MetroWest, and Worcester County jobs we see quoted. These assume a standard 22-inch by 46-inch or 30-inch by 46-inch opening on an asphalt-shingle roof, one skylight, and a decent (not exotic) crew.

Job	Typical MA range (2026)	What drives it high
Fixed deck-mount skylight, replaced during a reroof	$1,400–$2,800	Larger opening, low-E argon glass, custom flashing
Fixed deck-mount skylight, standalone (roof stays)	$2,000–$4,500	Access and staging, shingle blend, hidden rot
Venting (manual crank) skylight	$2,800–$5,200	Roof pitch, size, rain sensor
Electric or solar-powered venting skylight	$4,000–$7,500	Motor, sensor, controls, roof access
Glass-only (IGU) swap on a Velux or Fakro under warranty	$500–$1,200	Warranty vs out-of-warranty; whether the flashing kit stays
Remove skylight and patch deck (opt out)	$800–$1,800	Interior drywall, paint, shaft insulation, attic tie-in

Two things about those numbers. First, the skylight unit itself is often only 30% to 40% of the bill in MA. The rest is flashing, ice-and-water shield, labor, staging, and interior finish, and every one of those is more expensive in Greater Boston than in a cost-of-living-average state. Second, "during a reroof" pricing assumes the crew is already on the roof. Asking your roofer to bid the skylight in the same contract, itemized on the same proposal, is worth several hundred dollars of avoided access cost.

For the diagnostic side of things (is the skylight actually leaking, or is that condensation, or is it an ice dam), see our skylight leaks and diagnosis guide. This piece is the cost-and-rebate answer once you've decided you're replacing.

What is actually in the price

A fair MA quote for a fixed-deck-mount replacement should itemize:

• The skylight unit itself, ENERGY STAR-labeled for the Northern climate zone with an NFRC label you can read.
• The matching manufacturer flashing kit, not "we'll flash it in." This is the single most common warranty-voider on the roof.
• Ice-and-water shield around the curb, typically 24 inches on all four sides. Not code-required at a mid-roof penetration in MA, but any good roofer does it.
• Labor and staging.
• Interior trim, drywall patch if the shaft comes down, and paint.

If the quote is a one-line lump sum with no flashing kit called out, that's a bid you cannot compare, and it's usually the one that comes in a little low.

Does Mass Save pay for a new skylight in 2026?

Almost never in practice. The Mass Save residential windows rebate pays $75 per ENERGY STAR Most Efficient certified window (Northern Region) in 2026, per Mass Save. The rebate is written against windows on the Windows Qualified Product List. Mass Save's WQPL page and rebate form use the word "windows"; skylights are not enumerated as a separate qualifying product category. That means the $75 rebate that shows up on so many MA installer landing pages does not follow the roof up onto a skylight in any way the program has spelled out. If you want confirmation for your specific unit, ask Mass Save directly, in writing, and get the case number on the reply.

Our full read on the $75 program (who actually qualifies, the single-pane requirement, the assessment gate) is in the Mass Save windows rebate guide.

Where Mass Save money does hit a skylight job is around the opening, not through the unit:

• Attic and light-shaft insulation. Per Mass Save, air-sealing and insulation work is typically 75% to 100% covered after a no-cost Home Energy Assessment. The vertical walls of a skylight shaft are one of the most under-insulated surfaces in a pre-1990 MA house. When you drop the shaft during a replacement, that's the moment to insulate and air-seal it, and the moment the assessment-linked rebate is easiest to collect.
• HEAT Loan financing. The Mass Save HEAT Loan is 0% interest, up to $25,000, with a $25,000 lifetime cap since January 1, 2025. If your skylight replacement is bundled with weatherization or other qualifying measures identified during the assessment, the loan usually covers the project. That is not a rebate. It is subsidized interest, worth roughly $4,000 to $7,000 in avoided finance cost on a $20,000 project compared to a standard 8% to 10% home-improvement loan.

If you live in one of the roughly 40 Massachusetts towns served by a Municipal Light Plant (Belmont, Concord, Reading, Wellesley, Mansfield, Taunton, and several dozen others), you generally cannot use Mass Save at all. Some MLPs run their own weatherization incentives, but a skylight-specific rebate is rare. Look at the bottom of your electric bill. If the utility name is not a Mass Save sponsor, you are an MLP customer.

Is there a federal tax credit for skylights in 2026?

No, and this is where a lot of MA quotes get sloppy. Two separate credits used to touch skylight work, and both are gone.

• 25C, the Energy Efficient Home Improvement Credit. Through 2025, ENERGY STAR Most Efficient skylights qualified at 30% up to a $600 combined cap on windows and skylights, per the IRS. Under P.L. 119-21 (the One, Big, Beautiful Bill Act signed July 4, 2025), 25C expired for property placed in service after December 31, 2025. Skylights installed in 2026 are not eligible.
• 25D, the Residential Clean Energy Credit. This was the 30% credit that some installers used to pair with solar-powered venting skylights (the motor is powered by an on-unit solar cell). 25D also expired for projects installed on or after January 1, 2026. And notably, Velux itself, after review of the tax-law changes, has stopped promoting 25D on solar-powered skylights, accessories, or installation cost. If a 2026 quote line-items "30% federal tax credit on the solar skylight," that is not a live credit and it is not Velux's own position anymore.

Push back on any 2026 proposal that assumes either credit. Ask the contractor to strike the line and requote. The federal tax picture on skylights is not a planning input for projects starting now, and the honest quote is the one that never used it.

What Massachusetts code and snow load force you to spec

Skylights in Framingham, Fitchburg, or Falmouth live in a harder envelope than skylights in the SERP's national cost guides. Two rule sets do the work.

Safety glazing, under 780 CMR Chapter 24

Massachusetts requires skylight glazing to be safety-rated. Per the 780 CMR Chapter 24 amendments (the state's adopted version of the IRC glass and glazing chapter), skylights and sloped glazing use one of tempered glass, laminated glass, wired glass, or an approved plastic. In practice, virtually every modern factory skylight on the MA market ships with tempered outer and laminated inner (or both tempered). If a "great deal" quote calls out a plain annealed glass unit, walk away. That is not a MA-legal installation.

The inspection catch: your building official will look for the manufacturer's NFRC label with the tempered or laminated marking. Keep the sticker until final sign-off.

Snow load and wind, under 780 CMR / ASCE 7

Massachusetts ground snow load varies from about 30 psf on the southeastern coast to 60+ psf in the Berkshires, per the ASCE 7 map that 780 CMR references. Boston is roughly 45 psf. Metrowest towns like Framingham and Marlborough sit around 45 to 50 psf. That drives real decisions:

• On a Velux fixed deck-mount, ask for the VSE snow-load rated variant (or newer equivalent) on any home west of 495. Standard VS units are engineered for lighter snow zones.
• On a Fakro, the CD (curb) or CH (deck) series carries the higher snow-load rating, and the spec sheet lists the exact psf.
• On a curb-mount unit at any elevation in the Berkshires, verify the curb framing was sized as headers, not just as trim. A skylight opening is a rafter cut, and the headers around it carry the snow load the rafters used to.

You will not read any of this on a national cost-guide page, because national cost-guide pages do not have to worry about January in Peabody.

Ice-and-water shield around the curb

Per 780 CMR (adopted IRC R905.1.2), a self-adhered ice barrier is required from the eave to 24 inches inside the exterior wall line, and on roofs sloped 8/12 or steeper, at least 36 inches measured along the slope from the eave. That rule does its job at the eave. It does not require ice-and-water shield around a mid-roof skylight. A good MA roofer does it anyway, on all four sides of the curb, because the freeze-thaw around a skylight is where mid-roof leaks live. Ask specifically. "Do you shield around the curb?" is a one-sentence quality filter.

For a fuller read on how NFRC labels tie together (U-factor, SHGC, VT, air-leakage), our NFRC label guide for MA windows applies to skylights too. The V7 ENERGY STAR skylight spec for the Northern climate zone (effective October 23, 2023, per energystar.gov) sets U-factor at 0.45 or lower. That's an easier target than the windows Most Efficient bar (U 0.20 or lower), so it's rarely the constraint.

Repair or replace? When a glass-only swap makes sense

If the failure is a fogged insulated glass unit (IGU) on a factory Velux or Fakro that's still under its glass warranty (typically 10 or 20 years depending on model), a glass-only replacement runs $500 to $1,200 in MA, and the flashing kit stays put. That's the cheapest exit.

If the unit is out of warranty and 15-plus years old, do not chase it. The math for anything older than about 12 years favors replacement over repair once you count the reroof context and the fact that a new flashing kit is going on anyway. Our foggy IGU guide covers when a glass-only swap holds up. Skylights follow the same logic, except the labor to reach the glass is higher on a roof than at eye level.

The hidden line items that blow up a skylight quote

The "just replace the unit" price is what wins the phone call. What ships the check higher is what's under the shingles once the crew opens it up.

• Deck rot around a leaking skylight. Roof-deck sheathing that has been fed by a slow flashing leak for a few winters is soft. Cutting back to sound plywood, sistering rafters where the fungus reached, and re-decking around the opening can add $500 to $3,000 to a job. Nobody quotes this up front. Ask your contractor to write in an "if deck rot is discovered on tear-off, we will notify and price at $X per sheet of OSB / $X per linear foot of rafter repair" clause. That converts a surprise into a decision.
• Shaft insulation and air-sealing. The vertical shaft walls between the ceiling drywall and the roof opening are almost never insulated on a pre-1990 MA home. Reinsulating with rigid foam or dense-pack cellulose and air-sealing the shaft to the attic plane runs another $300 to $900 as a line item, and it is where the Mass Save weatherization rebate lands.
• Interior drywall and paint. If the shaft interior comes down (which it usually does on any leaking-skylight replacement), plan on $300 to $900 in drywall and paint to reset it. On a stained ceiling, you may want to reprime and repaint the whole room to hide the tape line. Get that quoted separately, not as an afterthought.
• Staging and steep roofs. Anything above a 9/12 pitch, anything on a triple-decker, and anything in Boston, Cambridge, or Somerville where street access is tight adds staging cost. That is $400 to $1,500 depending on the block.
• Permits. A skylight replaced during a reroof is usually covered under the roofing permit. A standalone skylight, especially a new opening, needs its own building permit because it touches structural framing. Permit fees in MA typically run $50 to $200; the delay is what matters more than the fee. Your local building department writes the final answer.

None of this is boilerplate. It is what actually turns a $2,400 verbal estimate into a $3,800 invoice.

What a fair quote looks like in Massachusetts

A quote you can sign has these things on it, in writing:

1. Skylight make, model, and NFRC-rated U-factor and SHGC. Northern climate zone, U 0.45 or lower per ENERGY STAR V7.
2. Snow-load rating on the model (Velux VSE, Fakro CD or CH, or spec-sheet psf).
3. Matching manufacturer flashing kit for your roof type. Not "we'll flash it in."
4. Ice-and-water shield around the curb, all four sides, called out separately.
5. Deck-rot allowance with a per-unit price if concealed damage is found.
6. Shaft insulation, drywall, and paint, or a clean note that they are excluded.
7. HIC (Home Improvement Contractor) registration number, per the Office of Consumer Affairs and Business Regulation. If the person on the roof is not HIC-registered on owner-occupied 1- to 4-unit MA homes, that is a strike against them for you, not for them.
8. Permit responsibility spelled out (usually the contractor pulls it, verify).

Red flags: a big round-number quote with no flashing kit called out, a "we don't need a permit for this," a 30% federal tax credit line in 2026, or a promised Mass Save $75 skylight rebate that no one at Mass Save has confirmed in writing.

FAQ

Does Mass Save cover skylights?

Not directly, in practice. The Mass Save windows rebate pays $75 per ENERGY STAR Most Efficient certified window on the Windows Qualified Product List, and that list is written for windows. Skylights are not enumerated. What Mass Save will pay for on a skylight job is the weatherization around the light shaft (attic and shaft insulation, air-sealing), typically 75% to 100% covered after a Home Energy Assessment. If an installer promises the $75 rebate on your specific skylight, ask for it in writing from Mass Save with a case number before you count on it.

Is there a federal tax credit for skylights in 2026?

No. Per the IRS, 25C (which used to cover ENERGY STAR Most Efficient skylights at 30% up to $600) expired for property placed in service after December 31, 2025, and 25D (which some installers pushed for solar-powered venting skylights) expired for projects installed on or after January 1, 2026, under P.L. 119-21. Velux has publicly stopped promoting 25D on solar skylights. Any 2026 quote that builds in either credit is either using stale marketing or overstating what you'll get back.

How much does it cost to replace a skylight in Massachusetts?

For a fixed deck-mount unit bundled into a reroof, expect $1,400 to $2,800. As a standalone job, $2,000 to $4,500. Venting (operable) units run $2,800 to $5,200, and electric or solar-powered venting units run $4,000 to $7,500. Hidden deck rot, shaft insulation, and interior finish can add $500 to $3,000 on older leaking installations. Get any of that as a line item, not as a surprise.

Do I need a permit to replace a skylight in Massachusetts?

A same-size, same-location replacement done during a reroof is usually covered by the roofing permit. A standalone replacement, and always a new opening, needs a separate building permit because a skylight opening is a structural cut. Your local building department writes the final answer. Massachusetts also requires the installer to be Home Improvement Contractor (HIC) registered on owner-occupied 1- to 4-unit homes, per the Office of Consumer Affairs and Business Regulation.

Can I just replace the glass in my skylight?

Sometimes. If the failure is a fogged sealed unit on a factory Velux or Fakro still inside its glass warranty, a glass-only swap runs $500 to $1,200 in MA and the flashing kit stays. If the unit is 15-plus years old, out of warranty, or the flashing is tired, a glass swap is throwing good money at a bad platform. On any reroof, the answer is almost always to replace the whole unit while the roof is open.

Get your skylight quote priced against the real MA rules

A fair MA skylight quote has a snow-rated model, a matching flashing kit, ice-and-water shield around the curb, an honest deck-rot clause, and no phantom federal tax credit. That's a short list, and it filters out most of the low-ball proposals in one pass.

Tell us about the skylight (size, age, is it leaking, is there a reroof in the plan) and we'll route you to vetted Massachusetts contractors who quote it against the 780 CMR spec, not against a national template: get a free estimate. You can also browse the broader windows and doors trade hub for more MA-specific reads.