Velux window installation cost in Devon depends on window size, model, flashing type and roof condition. This guide gives honest, Devon-specific pricing for every common installation scenario. Free survey. Call 01392 759 295.
Prices are based on typical Devon jobs in 2025. Fixed quotes issued after free survey. All scaffold costs included as line items. No hidden extras.
| Job Type | Typical Cost | What’s Included |
|---|---|---|
| Standard GGL C04 (55x98cm), EDW flashing, concrete tile | £600–£750 | The most common Velux installation on Devon estate housing. Includes supply, fit, EDW flashing and tile reinstatement. |
| Standard GGL M06 (78x118cm), EDW flashing, concrete tile | £700–£900 | Larger window, same specification. More popular for bedroom conversions where headroom permits. |
| GGL on Welsh slate, EDL or heritage flashing | £750–£1,000 | Heritage slate requires specialist flashing — EDL or equivalent. More tile-cutting involved. |
| GGU polyurethane (bathroom spec), any tile type | £700–£950 | GGU model for high-humidity rooms. Same installation process, higher unit cost than GGL. |
| GPU top-hung opening window | £750–£1,000 | Top-hung model for steeper pitches. Larger air volume per opening. Same flashing specification. |
| Second window on same roof visit | £500–£700 | Scaffold and access cost shared across two windows. Significant saving vs two separate visits. |
| Conservation area, prior notification required | £800–£1,100 | Prior notification preparation included. Applies to Topsham, parts of Heavitree and city centre. |
Standard C04 (55x98cm) is the most common and most cost-effective. Larger windows cost more in unit and flashing material.
Standard EDW flashing for concrete tile; EDL or heritage flashing for low-pitch or slate roofs. Specialist flashings add £50–£150 to the flashing cost.
Each additional window on the same scaffold/access visit adds £500–£700. Two windows are significantly cheaper than two separate visits.
Conservation area prior notification adds administrative cost and sometimes material constraints. We advise at survey stage.
On Exeter’s 1960s–70s estate housing (Pinhoe, Whipton, Wonford), nail sickness check before drilling is included. Any loose tiles found are replaced.
All prices are guide figures. Fixed quotes are issued after a free survey of the specific job. No call-out fee. No obligation.
📞 Call 01392 759 295 for a Free Survey“Two windows installed in a single day. Shared scaffold cost made the second window excellent value.”
“Heritage flashing on our Victorian slate in Heavitree. Correct specification, no planning issues.”
“Conservation area prior notification handled by them. No delays. Professional throughout.”
From £600 for a standard window on concrete tile to £1,100 for a conservation area property with specialist flashing. Free survey. Call 01392 759 295.
Yes — significantly. Scaffold and access cost is shared. Two windows on one visit costs £1,100–£1,650 vs £1,200–£1,800 for two separate jobs.
Most installations are permitted development. Conservation area properties require prior notification. We confirm the planning position at every survey.
Supply of Velux unit, flashing kit (EDW or heritage), installation, tile reinstatement, and 10-year workmanship guarantee. Free survey included.
One window: half a day. Two to three windows: a full day. Same-day weathertight.
GGU (polyurethane, bathroom spec) costs £50–£100 more than GGL at the same size. Both use the same flashing and installation process.
Yes — 10-year workmanship guarantee on all installations. Call 01392 759 295.
The most common source of Velux installation cost surprises in Devon is the discovery of nail sickness or a conservation area planning requirement after the window has been ordered. Our survey process addresses both before ordering. Nail condition is checked by hand-pressure test on the tiles adjacent to the proposed window location — any mobile tiles are noted and included in the installation scope. The planning position for the specific property and elevation is confirmed before the window model or size is finalised. This means the fixed price we quote after the survey is the price you pay, with no add-ons discovered on the day.
Installing two Velux windows on the same Devon property in a single visit costs significantly less than two separate single-window visits. Scaffold or access equipment is the largest variable cost element, and it is erected once regardless of how many windows are being installed. For a standard Devon semi requiring scaffold access, the second window on the same visit adds £500–£700 to the total cost rather than £600–£900 as a standalone job. We always present the combined cost option during the survey for homeowners considering more than one window.
The long-term cost of a correctly installed Velux window in Devon is low. The window unit carries a manufacturer’s 10-year guarantee. Our installation carries a 10-year workmanship guarantee. The flashing kit — EDW or heritage — is maintenance-free under normal Devon conditions. The only recurring cost is an annual inspection of the seal at the tile-to-flashing interface, which should be included in any annual roof survey. Velux windows installed to the correct specification with the correct flashing for the roof type typically provide 25–40 years of service before any component requires attention.
Free survey across Exeter and Devon. Fixed price quote. No call-out fee. 10-year guarantee.
01392 759 295