Skylight Installation Pricing Guide
Skylight installation costs $1,200–$3,500 per unit for a standard fixed skylight including materials and labor. Venting skylights run $1,800–$4,500 installed. Tubular skylights (sun tunnels) cost $500–$1,500 installed. VELUX and Fakro are the leading brands, with skylight units costing $300–$1,200 and flashing kits adding $75–$250. Labor for installation typically runs $500–$1,500 per skylight depending on complexity.
Skylight installation is a high-value specialty service that many roofing contractors can add to their offerings. Whether installing a new skylight during a roof replacement or replacing an aging unit, skylights command premium pricing relative to the labor involved. The key to profitable skylight work is proper flashing, understanding manufacturer installation requirements, and knowing when to recommend replacement versus re-flashing during a re-roof.
Fixed Skylight Installation Costs
Fixed (non-opening) skylights are the most common type for residential installations. VELUX fixed skylights range from $250–$600 for the unit depending on size and glass type — tempered glass is standard, while laminated glass is required by code in some applications. Fakro fixed skylights are priced similarly at $200–$550. Standard sizes include 21x27, 21x46, and 30x46 inches. Flashing kits are sold separately and cost $75–$200 — always use the manufacturer flashing kit rather than site-fabricated flashing to maintain warranty coverage. Labor for installing a fixed skylight on an existing roof runs $500–$1,000 per unit: this includes cutting the roof opening, framing the curb or deck-mount opening, installing the skylight, applying the flashing kit, and integrating with the surrounding roofing material. During a roof replacement, skylight installation is more efficient — charge $300–$700 per unit when bundled with a re-roof.
Venting and Solar-Powered Skylight Costs
Venting skylights open to provide both light and ventilation. Manual venting skylights from VELUX cost $400–$800 for the unit, while solar-powered venting models (VELUX VSS series) run $700–$1,200. Solar-powered models qualify for the federal solar tax credit (currently 30%), making them an easy upsell. Fakro venting skylights are priced comparably at $350–$900. Electric-powered skylights (VELUX VSE series) require running low-voltage wiring, adding $200–$400 in electrical work. Labor for venting skylight installation runs $600–$1,500 per unit — the additional complexity of sealing an operable unit properly and routing controls adds time compared to fixed units. VELUX Active with Netatmo integration ($200 add-on) provides automated opening based on temperature, humidity, and CO2 levels — this premium feature appeals to tech-savvy homeowners and justifies higher pricing.
Tubular Skylight (Sun Tunnel) Pricing
Tubular skylights — also called sun tunnels or light tubes — are a budget-friendly alternative to traditional skylights. VELUX Sun Tunnels cost $200–$400 for the kit including the dome, reflective tube, and diffuser. Solatube is another leading brand at $300–$600 per unit. Rigid tubes deliver more light than flexible tubes but cost 20–30% more. Available in 10-inch and 14-inch diameters — 14-inch tunnels illuminate rooms up to 300 square feet. Installation is significantly faster than traditional skylights: a skilled installer can complete a sun tunnel in 1.5–3 hours because no structural framing modification is needed. Labor runs $300–$600 per unit. Total installed cost of $500–$1,500 makes sun tunnels an accessible option for bathrooms, hallways, and closets that need natural light. Offer sun tunnels as an add-on during roof replacements for maximum efficiency.
Skylight Replacement During Re-Roofing
Every roof replacement should include a skylight assessment. Skylights have a 15–25 year lifespan — if the roof is being replaced after 20 years, the skylights are likely due for replacement too. Replacing skylights during a re-roof is dramatically cheaper than doing it later: the roofing material is already removed, flashings are being rebuilt, and the crew is on-site. During a re-roof, skylight replacement costs $800–$2,000 per unit (versus $1,500–$3,500 standalone) because the tear-off, flashing integration, and roof patching labor is already included in the roofing scope. Present this as a recommendation to every customer with existing skylights: replacing a 20-year-old skylight later as a standalone project costs nearly double what it costs during the re-roof. The risk of leaks from aging skylights is also a compelling selling point.
Flashing and Waterproofing Details
Improper flashing is the number one cause of skylight leaks, and leak callbacks are expensive and damage your reputation. Always use manufacturer-supplied flashing kits ($75–$250) — these are engineered to integrate with specific skylight models and roof pitches. VELUX and Fakro both offer step flashing, deck-mount, and curb-mount kits for different installation types. Apply ice and water shield membrane around the entire skylight perimeter, extending at least 8 inches beyond the flashing in all directions. For low-slope applications (below 4/12 pitch), use curb-mount skylights with enhanced flashing — deck-mount skylights on low slopes invite ponding water at the upper flashing edge. On tile or metal roofs, custom counter-flashing is often required, adding $200–$500 to the installation cost. Document your flashing installation with photos for warranty purposes and to demonstrate workmanship quality to the customer.
Pricing Strategy and Profit Margins
Skylight work delivers excellent margins for roofing contractors. Target 45–55% gross margin on standalone skylight installations and 50–60% when bundled with re-roofing. Present your pricing as a complete package: skylight unit, flashing kit, labor, ice and water shield, interior finishing (if applicable), and cleanup. Avoid hourly pricing — the value you deliver is a properly installed, leak-free skylight with full manufacturer warranty coverage, not hours worked. For proposals, include the energy efficiency benefits: ENERGY STAR-rated skylights reduce lighting energy costs, and solar-powered venting models qualify for the 30% federal solar tax credit. Include photos of your previous skylight installations to build confidence. Always provide a separate workmanship warranty (5–10 years) alongside the manufacturer product warranty (10–20 years on most VELUX and Fakro units).
Frequently Asked Questions
Yes, strongly recommend replacing skylights that are over 15 years old during a roof replacement. The cost savings are significant — $500–$1,500 less per unit than standalone replacement because the roofing material is already removed and the crew is on-site. Aging skylights are also the most common source of roof leaks, making replacement a proactive investment.
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