Window & Bifold Door Leads for Suppliers & Fitters
BuildAlert helps window, bifold and glazing companies win work by showing projects before the homeowner starts looking for suppliers. Planning applications are the earliest sign of new windows, bifolds, sliding doors, rooflights and lanterns being installed – and no other lead source gives you that kind of head start.
We track and tag projects across the UK that require new glazing – extensions, kitchen-diners, garden rooms, roof alterations and new builds. Installers use BuildAlert because they can see real jobs before competitors do, check drawings and ownership details, and send a branded letter straight to the homeowner’s door in a single click.
Why Window Fitters Use BuildAlert
- See extensions, refurbishments and new builds in your area that will need new windows, doors or glazing.
- Filter by project type — rear extensions, kitchen-diners, loft conversions, garage conversions and more.
- Quickly spot projects with new openings, enlarged windows, bifolds, sliders or rooflights.
- Check site details and documents to understand glazing requirements before reaching out.
- Contact homeowners directly with personalised letters — no shared leads or middlemen.
- Pay only when you send a letter, branded with your logo and contact details.
Enter your postcode to discover £1000s worth of building jobs near you
“Instead of waiting for enquiries, glazing companies use BuildAlert to see projects months before the frames are ordered.”
Example: BuildAlert highlights planning applications where glazing, windows and bifold doors are requiredWindow & Glazing Projects We Help You Win
🪟 Window Replacement & Upgrade Leads
Extensions and major refurbishments often include new windows, bigger openings, or full replacements.
BuildAlert tracks planning applications that indicate external changes, so you can reach homeowners when they’re choosing frames and glass.
Target high-value, whole-house window upgrades instead of one-off repairs.
🚪 Bifold & Sliding Door Leads
Rear extensions and open-plan kitchen projects are prime opportunities for aluminium bifolds and large sliders.
BuildAlert highlights projects adding new openings to the rear elevation, patios, and garden rooms — exactly where bifold doors are specified.
Be first to quote for doors before a general builder or designer bundles in a generic option.
🏡 Conservatory & Orangery Leads
Conservatories, orangeries, and glazed extensions require specialist glazing and roof systems.
By monitoring planning applications for these structures, BuildAlert helps you find homeowners who are already budgeted for premium glazing.
Position your company as the glazing expert before they accept a one-size-fits-all package.
🏗️ Glazing for Extensions & New Builds
Extensions and new builds usually involve multiple windows, doors, and rooflights — all needing supply and installation.
BuildAlert gives you early sight of these projects, including drawings and elevations, so you can quote accurately.
Win full-package glazing jobs instead of waiting for occasional replacements.
🏢 Shopfront & Commercial Glazing Leads
Small commercial refurbishments, office fit-outs, and change-of-use projects often require new aluminium shopfronts and screens.
Use BuildAlert to spot these applications and contact business owners or project leads directly.
Ideal for glazing companies who offer both domestic and light commercial work.
🌤️ Rooflights, Lanterns & Feature Glazing
Flat roof extensions and kitchen diners often include roof lanterns, skylights, or feature glazing.
BuildAlert surfaces projects where roof alterations or flat roofs are proposed — a strong signal for rooflights and lanterns.
Offer premium glazing upgrades while the homeowner is still finalising their specification.
Window & Bifold Door Leads in Your Area
Every week, BuildAlert scans over 20,000 planning applications across the UK to find projects that will need new windows, bifold doors and glazing. From kitchen-diner extensions to full refurbishments, you’ll see real jobs happening near you — and reach homeowners long before they start searching for “window fitters near me” or “bifold suppliers near me”.
What Glazing Companies See Each Week
- 3,500+ extensions and major renovations
Rear, side and wraparound extensions — the biggest source of new bifolds, sliders, windows and rooflights.
- 400+ single new-build homes
Self-builds and individual plots needing complete glazing packages, often with premium aluminium frames.
- 1,000+ domestic alteration projects
Garage conversions, porches and internal reconfigurations that create new openings or require larger windows.
- 1,000+ lofts and roof conversions
Dormers, hip-to-gables and roof alterations where homeowners need rooflights, gable glazing or upgraded windows.
Weekly average based on planning applications submitted across UK local authorities. BuildAlert updates this data daily so glazing companies can find local window and door leads quickly.
How BuildAlert Finds Window & Glazing Leads
BuildAlert scans planning applications from councils across the UK and identifies projects that will need new windows, bifold doors, sliders or rooflights. You search by postcode, radius and project type to quickly find extensions, refurbishments and new builds in your area. When a project looks right for your business, you can send a personalised letter directly to the homeowner in one click.
Mail-Ready Outreach for Window Fitters
For each chosen project, BuildAlert generates a letter with the homeowner’s name and address already filled in. Add your logo, product range (uPVC, aluminium, timber, bifolds, sliding doors, rooflights), and contact details — we handle printing and postage for £1.60 per letter. No subscriptions. No pay-per-click ads. Just targeted glazing leads delivered by post.
Affordable, Targeted Marketing for Glazing Companies
BuildAlert is one of the cheapest ways to market your window or bifold door business. You only pay £1.60 per letter, which includes printing and postage, and each letter is delivered directly to a homeowner with a live project. No shared leads, no bidding, and no wasted ad spend — just predictable, low-cost marketing that reaches real customers.
“We’ve filled quiet months by targeting extensions in our area. One BuildAlert campaign paid for itself with a single full-house window job.”
— Sarah, Window & Bifold Installer in the North West
Frequently Asked Questions
Is BuildAlert just for builders, or is it suitable for window fitters?
BuildAlert is ideal for glazing companies, window fitters, and bifold door installers as well as builders. We use planning applications to help you find double glazing leads, window replacement leads, and bifold door leads in your area.
Can you help me get double glazing leads in my area?
Yes. You can search by postcode and radius to see planning applications that require new glazing. This makes it easy to focus on local double glazing leads and window fitting jobs near you.
Do you provide exclusive window and bifold door leads?
Your outreach is unique to you. While planning data is public, the letters you send through BuildAlert are branded with your logo and details and are sent directly to the homeowner from your business.
Can I focus only on larger glazing jobs like extensions and full-house replacements?
Yes. You can filter by project type and focus on extensions, major refurbishments, and new builds where full glazing packages, bifold doors, and rooflights are being installed.
Do you show drawings and elevations for glazing projects?
Where documents are available from the council portal, BuildAlert shows plans and elevations so you can see window layouts, opening sizes, and where bifolds, sliders or rooflights are being added before you contact the homeowner.
How much does it cost to use BuildAlert for window and bifold leads?
Browsing planning applications is free. You only pay £1.60 per letter when you decide to contact a homeowner. Printing and postage are included and there are no subscriptions or long-term contracts.
Ready to Find Window & Bifold Leads Near You?
Create Free AccountBuildAlert helps UK window fitters, glazing suppliers, and bifold door installers find local job leads by tracking relevant planning applications. From extensions and refurbishments to new builds and orangeries, you can target warm window and door leads near you — without relying on generic lead marketplaces or expensive ads.