Window & Bifold Door Leads for Suppliers & Fitters

Rear, side and wraparound extensions, kitchen-diner remodels, loft conversions and dormers, conservatories and orangeries, new build and self-build homes, garage conversions, whole house renovations, and shopfront or commercial fit-outs are the project types most consistently requiring new windows, doors or glazing.

Extensions and loft conversions are the highest-volume source of bifold, sliding door and rooflight work, while conservatories, orangeries and new builds tend to be the most valuable full-package glazing contracts.

Unlike trades that are only booked once building work starts, window and door specification is often decided at the design stage. The elevations submitted with a planning application usually show the exact opening sizes and door positions being proposed, which means the homeowner is already thinking about frame material, colour and glazing spec before permission is even granted.

That makes early contact - as soon as an application is submitted - the strongest window for window and bifold leads, while the homeowner is still comparing suppliers rather than after they have already chosen one.

Searching for the underlying building project tends to surface more relevant results than searching for 'windows' or 'glazing' alone, since planning applications describe the construction work rather than the products being installed.

Useful terms include rear extension, wraparound extension, kitchen extension, bifold doors, sliding doors, French doors, conservatory, orangery, loft conversion, garage conversion and shopfront. Combining a project-type filter with your postcode and radius narrows results to genuinely relevant jobs.

Yes. Set your postcode and a radius, and BuildAlert shows you planning applications in that area likely to need bifold or sliding doors, particularly rear and side extensions and open-plan kitchen remodels.

Yes. Where available from the council portal, BuildAlert shows the plans and elevations submitted with an application, so you can see window layouts, opening sizes and where bifolds, sliders or rooflights are being added before you make contact.

Yes. You can filter by project type to focus on extensions, major refurbishments and new builds where full glazing packages, bifold doors and rooflights are being installed, rather than smaller one-off replacements.

Yes. BuildAlert is used by glazing companies, window fitters, bifold and sliding door installers and conservatory specialists, as well as general builders.

If you win work from homeowners planning extensions, conservatories or new builds, BuildAlert helps you find these projects before most competitors.

Planning applications are public information, so other glazing companies could identify the same projects.

Unlike shared lead generation websites, BuildAlert doesn't sell the same enquiry to multiple suppliers. You decide which homeowners to contact and when.

The planning application itself is public data, but your outreach is entirely your own. Letters sent through BuildAlert are branded with your logo and contact details and posted directly to the homeowner from your business - there is no bidding process and no enquiry resold to competitors.

Browsing and searching planning applications is completely free, with no subscriptions, monthly fees or long-term contracts.

You only pay £2.00 per letter when you choose to contact an applicant, which includes printing, your branding and first-class postage.