Skylight Replacement Cost: Full Breakdown by Type (2026)
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💰 Cost Breakdown
| Item | Low | Average | High |
|---|---|---|---|
| Fixed Skylight Replacement Non-opening skylight that provides natural light only. Simpler installation since there are no mechanical components. Glass or acrylic dome options available. Most common size is 21" x 46" (deck-mounted). Ideal for hallways, closets, and rooms where ventilation isn't needed. | $800 | $1,200 | $2,000 |
| Vented (Operable) Skylight Replacement Opens manually with a pole or crank, or electrically with a remote control. Provides both light and ventilation. Electric models often include rain sensors that auto-close. More complex installation due to wiring (electric) or linkage mechanisms (manual). | $1,500 | $2,200 | $3,500 |
| Tubular Skylight Replacement A 10–14 inch diameter tube that channels sunlight from the roof through a reflective tunnel to a diffuser lens in the ceiling. Much less invasive to install than traditional skylights — no structural framing required. Best for small rooms, bathrooms, and hallways. | $500 | $800 | $1,200 |
| Flashing Kit Replacement Only If the skylight glass and frame are in good condition but the flashing (the metal weatherproofing around the skylight) has failed, replacing just the flashing kit saves the cost of a full skylight unit. Most leaking skylights need flashing replacement, not glass replacement. | $300 | $500 | $800 |
| Interior Finishing (Drywall, Trim, Paint) After skylight replacement, the interior light shaft often needs drywall patching, new trim, and painting. This is sometimes included in the contractor's price and sometimes a separate line item. Flared light shafts (wider at ceiling than roof) cost more to finish. | $150 | $350 | $600 |
Fixed Skylight Replacement
Non-opening skylight that provides natural light only. Simpler installation since there are no mechanical components. Glass or acrylic dome options available. Most common size is 21" x 46" (deck-mounted). Ideal for hallways, closets, and rooms where ventilation isn't needed.
Vented (Operable) Skylight Replacement
Opens manually with a pole or crank, or electrically with a remote control. Provides both light and ventilation. Electric models often include rain sensors that auto-close. More complex installation due to wiring (electric) or linkage mechanisms (manual).
Tubular Skylight Replacement
A 10–14 inch diameter tube that channels sunlight from the roof through a reflective tunnel to a diffuser lens in the ceiling. Much less invasive to install than traditional skylights — no structural framing required. Best for small rooms, bathrooms, and hallways.
Flashing Kit Replacement Only
If the skylight glass and frame are in good condition but the flashing (the metal weatherproofing around the skylight) has failed, replacing just the flashing kit saves the cost of a full skylight unit. Most leaking skylights need flashing replacement, not glass replacement.
Interior Finishing (Drywall, Trim, Paint)
After skylight replacement, the interior light shaft often needs drywall patching, new trim, and painting. This is sometimes included in the contractor's price and sometimes a separate line item. Flared light shafts (wider at ceiling than roof) cost more to finish.
📊 Factors That Impact Cost
Skylight Type and Size
High ImpactFixed skylights are the cheapest. Vented add $500–$1,500. Larger custom sizes cost more than standard dimensions. Electric venting with rain sensors is the premium tier at $2,500–$3,500 installed.
Roof Pitch and Access
Medium ImpactSkylights on steep roofs (8:12 or higher) require additional safety equipment and slower work. Second-story skylights with limited interior access add difficulty. Ground-floor single-story installations are the easiest and cheapest.
Replacement vs. New Cut-In
High ImpactReplacing an existing skylight in the same opening is straightforward. Cutting a new opening requires structural framing (headers and trimmers), which adds $500–$1,500 in carpentry work.
Curb-Mount vs. Deck-Mount
Medium ImpactDeck-mount skylights sit flush against the roof deck and are standard on most homes built after 2000. Curb-mount skylights sit on a raised frame (curb) and are common on flat and low-slope roofs. Curb-mount replacements are simpler if the existing curb is reusable.
💡 Money-Saving Tips
Replace skylights during a roof replacement
When the roof is already being torn off, the roofer can replace skylights with minimal additional labor. The flashing integrates seamlessly with new shingles. Doing it separately later means tearing up new shingles around the skylight.
Choose a fixed skylight over vented if ventilation isn't critical
Fixed skylights cost $500–$1,500 less per unit than vented models and have fewer components that can fail. If the room has other ventilation (windows, exhaust fan), a fixed skylight delivers the same natural light at lower cost.
Replace flashing only when the glass is intact
Many 'leaking skylights' have perfectly good glass — the leak is at the flashing. A $300–$800 flashing replacement solves the problem without the $800–$2,000 cost of a new skylight unit.
Use manufacturer flashing kits instead of custom fabrication
Velux, Fakro, and other manufacturers sell step-flashing kits designed for their skylights. These cost $50–$150 and install in a fraction of the time compared to custom sheet-metal flashing fabricated on site.