Velux installation, replacement and flashing repair across Chichester. Conservation-specification units for listed properties and Cathedral Close. All tile types, free surveys.
Velux installation in Chichester costs £450–£850 per window, with conservation specification for heritage properties. We confirm the planning and consent position before any installation. Free survey, no call-out fee. Call 01243 278085. Conservation and standard specification across Chichester and West Sussex.
Velux roof window installations and replacements are a natural extension of roofing work — the flashing kit that integrates the window into the roof covering is critical to keeping water out, and installing or replacing roof windows correctly requires the same tile and slate knowledge that we bring to every repair and re-roofing job. We install Velux and equivalent roof windows across all property types in Chichester, from Victorian terraces in St Pancras to modern Graylingwell Park properties.
In Chichester's conservation area, the choice of roof window matters from a planning perspective as well as a performance one. Standard Velux windows are not appropriate on listed buildings or within the Cathedral Close conservation area — conservation-specification units with flush glazing and slim frame profiles are required. We specify these without needing to be prompted and can advise on whether your specific installation would require formal consent or falls under permitted development.
Many Chichester homeowners add roof windows as part of loft conversions — both the standard pitched-roof Velux approach and dormer conversions that require structural work alongside the roofing. We carry out the roofing and window installation component of loft conversions, working alongside structural engineers and builders as required. We can advise on roof window positioning to maximise natural light while meeting the planning requirements that apply to your property.
Single window (standard, supply and fit): £600–£1,000 · Single window (conservation spec): £900–£1,400 · Flashing kit replacement only: £250–£450 · Multiple windows: contact for package pricing · Free survey and quote on all installations.
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01243 278085"Two Velux windows installed on our St Pancras Victorian terrace — they used conservation spec units and confirmed the permitted development position before starting. Impeccable installation, no leaks, looks exactly right for the property."
"Leaking Velux on our Summersdale semi — they diagnosed a failed flashing kit rather than a window failure, replaced the kit only, and the cost was a fraction of a full window replacement. Honest and efficient."
"Three Velux windows for our loft conversion in Portfield — they coordinated with our builder and managed the roofing and window installation as one seamless job. Great result."
The standard Velux window profile sits raised above the tile surface with a visible frame. This is the appropriate product for most Chichester residential properties outside conservation areas — it is well-engineered, thermally efficient and widely available. The conservation specification Velux (the GGL or GPL conservation range) has a flush-glazed profile that sits within the tile plane with minimal visible frame. The visual impact is significantly lower — at distance the window is barely visible against the tile surface. For Chichester properties in the Cathedral Close, St Pancras and Whyke conservation areas, and for listed buildings throughout the district, conservation specification is the expected product. We fit both ranges and advise at the survey on which is appropriate for each property and position.
A single Velux window on a rear slope that does not protrude above the ridge line is generally permitted development in Chichester. Multiple windows on the same slope, any window on a front slope visible from the street, windows on listed buildings, and windows on properties in conservation areas where the installation would affect the character of the roofscape all require assessment. For listed buildings, Listed Building Consent is required for any Velux installation regardless of position. For conservation area properties, the planning position depends on the specific designation and the visibility of the installation. We advise specifically on the consent position before any work is committed to — we have enough experience of Chichester's conservation areas to give you a realistic view of what is and is not likely to be approved.
Free survey — no call-out fee — Chichester & West Sussex
📞 01243 278085A standard single Velux installation takes one full day. We open the roof, cut the rafters where required and fit a trimming frame between the adjacent rafters and across the top and bottom of the opening. The window goes in on the trimming frame. The Velux flashing kit — which is specific to the tile type and covers the junction between the window and the surrounding tiles — is fitted around the outside. The internal reveal is lined and made good. At the end of the day the roof is completely weathertight. For conservation spec windows on complex older roofs, or where multiple windows are being fitted together, the work takes two days. We never leave an open roof section overnight.
Modern Velux double and triple-glazed units have centre pane U-values well below 1.0 W/m²K — comparable to high-quality vertical windows. The peripheral heat loss at the frame and flashing interface is where specification matters: a correctly fitted Velux with the appropriate insulation collar around the frame performs significantly better than one where the reveal is not properly insulated. On Chichester's Victorian properties with uninsulated roof spaces, a Velux installation provides an opportunity to improve the roof space insulation at the same time. We advise on what is practical given the property type and the scope of the window installation.
A Velux roof window is often the first step in a Chichester loft conversion — providing the natural light that makes the loft usable as a habitable room without the planning implications of a full dormer conversion. The roof space in a typical Chichester Edwardian semi or Victorian terrace has significant habitable potential once lit. Adding two or three properly positioned Velux windows transforms a dark storage space into a light-filled study, hobby room or additional bedroom without altering the external roofline visible from the street. For properties in conservation areas, this approach — internal light without external change — avoids the consent issues associated with dormer additions on listed and conservation area properties.
Velux roof windows require minimal maintenance — the exterior glass is self-cleaning glass on most units manufactured after 2000, which uses a photocatalytic coating to break down organic deposits. The main maintenance item is the rubber seal around the opening sash, which should be inspected every few years and replaced when it shows signs of compression or cracking. We carry out Velux maintenance visits across Chichester — seal replacement, operator mechanism servicing, and flashing inspection — on properties where the windows are approaching 15 to 20 years old. For Velux units where the glazing unit has failed — visible condensation between the panes indicating seal failure — we replace the glazing unit without replacing the whole window, which is significantly more cost-effective where the frame and flashing remain sound.
A single Velux window installation (supply and fit, including flashing kit) typically costs £600–£1,200 depending on window size and roof tile type. Multiple window installations benefit from shared access and scaffold costs. Conservation area flat-glass units cost more than standard windows — we advise on what's appropriate for your property.
In most cases, no — roof windows are permitted development provided they don't project more than 150mm above the roof plane and are not on a principal elevation. However, if your property is listed, within the Cathedral Close conservation area, or if you've had permitted development rights removed, consent may be needed. We advise during the survey.
Yes. For conservation area and listed properties we use conservation-specification Velux units — these have a slim profile with flush-fitting glass that sits closer to the roof plane and uses heritage colour frames. These are significantly different in appearance from standard Velux and are what Chichester's conservation team typically expects.
Yes. Leaking Velux windows are most commonly caused by failed flashing kits rather than the window itself. We replace flashing kits as a standalone job and can advise during inspection whether the window itself needs replacing or just the flashing collar.
Standard Velux windows on a rear roof slope that do not protrude above the ridge line are generally permitted development in Chichester. Front elevation skylights, conservation area properties, and listed buildings may require consent. We advise on your specific situation during the survey before any work is committed to.
Standard Velux units have a raised profile that sits above the tile line. Conservation spec Velux units (the GGL and GPL conservation range) flush-glaze to within the tile plane, significantly reducing visual impact. For any Chichester property in a conservation area or on a visible elevation near listed buildings, conservation spec is the appropriate product and in many cases the only one that will be accepted.
A standard single Velux installation takes one day including cutting the opening, fitting the window, installing the flashing kit and making good internally. Multiple units or conservation spec fitting on complex roofs may take two days. We confirm the programme in the quote. No overnight exposure — the opening is fully weathertight at the end of each day.
No call-out fees. No obligation. Just an honest quote from a local roofer.
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