Last updated 23 September 2026
Double glazing leads: the £15 price tag is the least of it.
Short answer: Lead Pronto sells window and door leads from £15 each, plus VAT, and booked appointments from £130. It's the only seller in the top results that prints a price. A click on a homeowner's window search in Google costs £3.06 to £18.33.
On a new front door or a houseful of windows, £15 is small change. What decides whether a window lead is worth having is where it came from and how many other firms have it, and that's where this trade has a history. The ICO has fined 8 window and glazing firms for unlawful marketing, £770,000 between them.
Before you buy a window lead
Read the seller's privacy policy, not just its sales page.
The trade page is written for you. The privacy policy is written for the homeowner, and it's the one that says how many companies their details can go to. On two of the sellers below, the two don't match. See where.
Where we stand
We don't sell double glazing leads. We help you get your own.
This guide is the honest version of what buying double glazing leads costs, and who else gets them. What we do instead is build window and door installers a website that turns visits into calls, and run Google Ads in an account in your own name, so every lead that comes in is a customer who found you, and nobody else was sold it.
The record
The ICO has fined 8 window firms for unwanted calls.
In January 2024 the Information Commissioner's Office announced a £150,000 fine for Poxell Ltd, a firm that "claimed to specialise in energy saving products such as double glazing as well as resin driveways". It made over 2.6 million calls to people registered with the Telephone Preference Service between March and July 2022, including calls "to individuals with dementia and other serious illnesses". It "had purchased several telephone lines in a bid to avoid detection" and kept calling until its phone provider cut it off.
Poxell isn't a one-off. The ICO's own register of civil monetary penalties names these window and glazing firms:
| Firm | Year | Fine | What the ICO recorded |
|---|---|---|---|
| Amber UPVC Fabrications | 2014 | £50,000 | Marketing calls to people registered with the TPS |
| Direct Choice Home Improvements | 2016 | £50,000 | Calls about doors, windows, conservatories, kitchens and bathrooms |
| Superior Style Home Improvements | 2019 | £150,000 | TPS calls "to try and generate UPVC installation leads". Unpaid |
| Euroseal Windows | 2022 | £80,000 | Listed under PECR on the register |
| Posh Windows UK | 2022 | £120,000 | 461,062 unsolicited calls. Unpaid |
| Crown Glazing | 2023 | £130,000 | 503,445 TPS calls; some callers claimed to represent the government |
| Poxell | 2023 | £150,000 | 2,647,805 calls; bought several phone lines to avoid detection. Unpaid |
| Coastal Windows & Conservatories | 2024 | £40,000 | Over 18,000 calls to TPS-registered numbers |
Crown Glazing's notice says its calls "were advertising double-glazing or a free energy test", and that some callers suggested "they were representing the government". Superior Style's calls were made, in the register's words, "to try and generate UPVC installation leads". Several of these fines are still marked unpaid, with the firm in liquidation.
That's the market a bought window lead comes out of. Most sellers are nothing like Poxell, and none of the sellers below is in that table (Lead Pronto's own ICO fine, over boiler texts, is covered further down). But one person told the ICO they'd had over 40 calls from Poxell alone, and a homeowner like that is wary of every window firm that rings. The ICO also expects the business that buys a lead to check where it came from. The questions to ask are further down.
Using the seller's own close rate
12 sales in 100 leads, applied to five jobs.
Lead Pronto publishes something most sellers don't: its own network's close rate. It says 12 of every 100 window and door leads its partners work end in a signed order. That makes one sale in roughly 8 leads, so at £15 a lead you spend about £125 on leads for every order. Here's that £125 against five window and door jobs at typical UK prices.
| Job | Typical UK price | Top price per lead | £125 per sale |
|---|---|---|---|
| Replace a misted sealed unit | £225 to £275 | about £5 | Loses money. 50% of the job |
| Supply and fit one uPVC casement window | £500 to £1,250 | about £16 | Just about. 14.3% of the job |
| Supply and fit a composite front door | £550 to £2,350 | about £26 | Pays easily. 8.6% of the job |
| uPVC lean-to conservatory | £9,000 to £11,500 | about £185 | Pays easily. 1.2% of the job |
| New windows, 3-bed house | £8,000 to £15,000 | about £207 | Pays easily. 1.1% of the job |
Prices from Checkatrade's cost guides (May and June 2026) and, for the composite door, MyJobQuote (September 2026). The close rate is Lead Pronto's own figure for its network, not an independent one. The third column is the most a lead can cost at that close rate if an order should cost no more than 15% of the job.
Repairs can't carry a bought lead
A misted unit is worth about £250. Spend £125 on leads to win one and 50% of the invoice has gone before you've measured the glass. If your van is full of sealed units and handles, buying leads at this close rate costs more than it earns.
Installs can carry almost anything
On a single casement window the same £125 is 14.3% of the job. On a three-bed house it's 1.1%. For replacement work, the lead price barely moves the sum, so the thing to buy carefully is the lead itself: who else has it, and whether the homeowner asked for it.
The job prices don't all agree. Checkatrade puts new windows for a typical three-bed house at £8,000 to £15,000, for 8 to 12 windows. The Window Man, one of the pages ranking for this search, says the "average install" costs "£2,000 to £5,000 or more". We've used Checkatrade's dated figure. Put your own in below.
Your own figures
Your jobs, your close rate, a seller's price.
The calculator opens on a whole-house job and on MyJobQuote's own figure of one win in three. For a bought window lead, Lead Pronto's published rate is nearer one in 8, so try the lowest setting too and see how much the answer moves. Then add the price a seller has quoted you.
WHAT CAN YOU PAY FOR A DOUBLE GLAZING LEAD?
Pick a job, or type in what yours are worth
Starts on one in three, the figure MyJobQuote tells its own trades to expect. Put in yours.
You can pay up to about
£575
a lead, winning one in 3
- Healthy range, per won job
- £1,150 to £1,725
- Which per lead is
- £383 to £575
Put a seller's price in the last box and this will tell you what each won job would cost you.
Keeping an order's lead cost to 10 to 15 percent of the job is a rough guide we use, not a measured figure.
Trade page against privacy policy
What installers are told, and what homeowners are told.
Every seller ranking for this search says its leads are qualified, and most say exclusive. We read their trade pages, their terms and the privacy wording they give homeowners. Here's what each one commits to in writing.
| Seller | Price | Who else gets it | In their words |
|---|---|---|---|
| Lead Pronto | From £15 + VAT a lead, £130 an appointment | Nobody, it says | "sold to a single installer and never resold" |
| Watts Marketing | Not published | Nobody, it says | "goes to one company and is never sold again" |
| Leads 2 Trade | By phone only | From none to 3 others, by tier | "sent out up to 4 times" on its Qualified tier |
| Leads Do Work | Per lead or weekly plan, not published | Not stated | "a network of over 300 websites and niche blogs" |
| Fullscale Digital | Fixed fee plus a fee per appointment | Nobody: your own campaigns | "generated through your own brand" |
Lead Pronto: "never resold" to you, "one or more companies" to them
Its window page says "Every lead is sold to a single installer and never resold". Its privacy policy, updated in August 2026, tells homeowners it shares their details "with companies who provide that product or service in your area", and that they "may be shared with one or more companies". It also says a postcode entered for windows can be used to check the homeowner for "other relevant energy-saving home improvement offers".
Both can be true at once: one installer per window lead, and the same homeowner passed to a solar or insulation firm as well. Ask which it is before you top up. The sales page also pulls in two directions on who the homeowner is. It promises people "actively looking to buy rather than chasing cold prospects", and a few paragraphs later says its brands generate leads "for people in the early stages of the buying process".
In its favour: a printed price, VAT stated, "No contract and no notice period", a rejection policy in every campaign, and 20 free leads after your first 100. It also says it supplies 35 window and door companies. In November 2025 the ICO fined it £30,000 over boiler grant texts, covered below.
Leads 2 Trade: four tiers, and a different number for homeowners
Leads 2 Trade is the most open about sharing. A Hot Key lead goes to one installer. A Premium lead is booked for "a maximum of 3 installers", though its FAQ describes the same tier as "only supplied to yourself and one other company". A Qualified lead goes out "up to 4 times", and the Lead Vault sells leftovers "first come first served".
Its privacy notice tells homeowners something smaller. Where it can't reach them by phone, it introduces them to "a maximum of two" suppliers, and it offers to name the partners "who may contact you (maximum of two)". A homeowner who read that isn't expecting a fourth installer to ring. You can reject a lead within 72 hours on listed grounds, including a duplicate from another source with proof. Prices are by phone, and closing your account takes 14 to 30 days' written notice.
Watts Marketing: appointments, one company each, no price
Watts sells booked appointments, not raw leads, and says each one "goes to one company and is never sold again, not that week and not the month after". It screens for homeowners in a house or bungalow, decent credit, a decision within 6 months and every decision maker present, and a booking that falls short "can be sent back for credit". It says "We do not cold call" and that homeowners come in through "a consumer brand we own", but it doesn't name the brand, so you can't read the wording they agreed to. It publishes no price. And it's honest about job size: "We do not set a minimum frame count".
Leads Do Work, and the advice page it owns
Leads Do Work sells window leads per lead or on a weekly subscription, with no published price and no sharing count. It says its leads come from "a network of over 300 websites and niche blogs", and one it names is thewindowman.co.uk. The Window Man's own guide to double glazing leads, one of the pages ranking for this search, recommends "Websites like Leads Do Work" without saying so.
Its public list of live window leads is worth a look before you pay. Alongside the new-window jobs, on 22 September 2026 it carried one from a homeowner "trying to get confirmation of u value of windows and back door you fitted in aug/sept 2024." That's an existing customer's paperwork question, sitting in a list of job leads.
The agencies, and one list that isn't leads at all
Purplex and Fullscale Digital run campaigns under your own brand, which makes the leads yours by design. Purplex says so itself: "leads that are solely yours". Its enquiry form starts at a marketing budget of £2,000 to £5,000 a month, and its terms ask for three months' written notice after the contract period, with the rest of the term chargeable if you leave early. Fullscale charges a fixed fee plus a fee per booked appointment and doesn't publish either. BuyerAlerts, also on page one, sells something different again: addresses of properties likely to need windows, for you to post a postcard to. That's a mailing list, not a homeowner who asked for a quote.
If the word "shared" puts you off, the sums behind it are in the shared-lead trap. The directories The Window Man suggests have their own guides: is Checkatrade worth it and is Bark worth it.
Everything here about Leads 2 Trade's contract comes from its own published terms and conditions, last read on 23 September 2026. Terms get revised, so check yours against the current version before you act on anything.
Rather have double glazing leads that are yours alone?
That's what we do. We don't sell leads. We build the website and run the Google Ads that bring double glazing customers straight to you, in an ad account in your name that stays yours if you ever leave.
See pricingYour own Google Ads
A window lead from your own ads costs more. Here's what the extra buys.
Google publishes no conversion rate. The nearest public one for home improvement is WordStream's 7.33% of search clicks, from US campaigns, so treat it as a rough guide. At that rate, here's what a lead costs on each window and door search.
| Job | Search | Per click | Per lead |
|---|---|---|---|
| Window replacement | window replacement | £18.33 | £250 |
| New windows | new windows | £14.86 | £203 |
| Replacement windows | replacement windows | £13.52 | £184 |
| Double glazing | double glazing | £12.16 | £166 |
| Finding a fitter | double glazing near me | £12.12 | £165 |
| uPVC windows | upvc windows | £7.75 | £106 |
| Window repair | window repair | £6.17 | £84 |
| Conservatory | conservatory | £5.30 | £72 |
| Composite doors | composite doors | £3.22 | £44 |
| Bifold doors | bifold doors | £3.06 | £42 |
Click prices are Google Ads data for the UK, pulled 23 September 2026. These are bid-based estimates, so most advertisers pay less per click than this.
On price per lead, Lead Pronto's £15 beats every line of that table, where your own ads come out at £42 to £250 a lead on these estimates. We're not going to pretend otherwise. Look at what the higher figure gets you, though:
- A homeowner who searched for you
- No consent chain to check
- Nobody else was sold their name
- Bid on installs, skip repairs
- Push hard in September
- You pay Google, with no markup
- Keep the ad account if you leave
The second line is the one this trade should care about most. A lead from your own ad is a person who typed a search and rang or filled in your form. There's no seller in the middle, no privacy policy you haven't read, and no question of whether their details went to "one or more companies". How to set a budget for it is in how much to spend on Google Ads.
One more number from the same pull: the trade's own search for "double glazing leads" costs £32.59 a click, dearer than any homeowner search above, at about 70 searches a month. Advertisers pay more to reach installers shopping for leads than installers pay to reach homeowners shopping for windows.
Local Services Ads cover repairs, not installs
Google's UK list of Local Services Ads categories includes "Window repair services", but no category for window installation or double glazing. If you do repairs, you can pass Google's screening and pay per answered call. For installation work, the searches in the table above are the route. More in how Local Services Ads work.
The building regulations
FENSA isn't the law. Sellers treat it as if it were.
gov.uk lists "replace windows and doors" among the jobs that can need building regulations approval, and adds: "You do not need to get approval yourself if you use someone registered with a competent person scheme." For replacement windows and doors in existing homes, the authorised schemes are Blue Flame Certification, CERTASS, Certsure, Fensa, NAPIT and ASSURE.
Joining one is a choice. In gov.uk's words, "Membership is voluntary - you can still use local council or private inspectors if you prefer." Leads 2 Trade tells installers that FENSA, CERTASS, ASSURE or CPA registration is "compulsory for installing windows in England and Wales". That's its entry rule, not the law. Watts gets it right: the registration "sits with the company doing the installation".
What homeowners are told to ask
FENSA tells them: "ask if you'll get a FENSA certificate. It's all the proof you need." It warns that if an installer doesn't offer one or another compliance certificate, "you'll need to pay for an inspection by building control", and calls the certificate "Essential when selling the property". Expect the question on the first call.
Why it still pays to join
gov.uk says scheme members' customers "benefit from lower prices as there are no building control fees", and Leads 2 Trade won't supply a window installer without it. CERTASS advertises membership at £26.95 a month and lists "Homeowner Leads" among its member benefits. The real cost of not joining is having to answer FENSA's question with "no".
So the order runs: registration first, then leads. Put your scheme number on your website and on every quote, because gov.uk tells homeowners that without approval they "will not have the certificates of compliance you may need when you want to sell your home." That line sells your certificate for you.
When the searches come
Windows sell in September, and again after Christmas.
UK searches for "double glazing" ran about 2.8 times higher in September than in August, and climbed back to 9,900 in January, the second-busiest month. If you buy or advertise, those are the two windows to be ready for.
UK searches for "double glazing", by month
September 2025 to August 2026. Google Ads keyword data, rounded bands.
A flat price all year is a summer tax
A lead package priced the same in August as in September is charging you peak rates for the quietest month of the year. Ask any seller whether its price or its volume moves with the season.
Use the quiet months for doors
"composite doors" and "bifold doors" each draw far more searches a month than "double glazing" does, at a fraction of the click price. When window searches dip, doors are the cheaper searches to keep your own ads running on.
Checks before paying
If the lead was obtained unlawfully, the ICO can look at you.
The ICO says a business buying marketing data "must undertake proportionate checks and due diligence", and "It is not enough to simply accept a third party's assurances." A business that asks someone else to make marketing calls for it can share the blame for them.
Two cases to know
In the same January 2024 announcement as Poxell, Skean Homes was fined £100,000 for over 600,000 calls. Its defence was its lead generation provider, and the defence failed.
On 6 November 2025 the ICO fined Lead Pronto Ltd £30,000 over 76,605 texts reading "Claim a Government-backed Free Boiler Grant!". It gave the ICO a list of 18 clients, none of them named in its privacy policy, and the ICO said "It cannot be argued that consent was informed." The case was about boilers, not windows, and Lead Pronto's current policy says it asks homeowners for opt-in consent before sharing.
Ask these before the first payment, and keep the answers in writing:
- Which website did they fill in?
- Can I see the exact form wording?
- Does it name my business?
- How many others get this lead?
- Did anyone cold call them first?
- What happens to a duplicate?
The fifth question is the one this trade can't skip. Seven of the eight glazing fines on the ICO's register describe marketing calls the homeowner never asked for, and the eighth gives no detail. A seller who is proud of its sources will show you the form. If the answer is a brand it won't name, ask again before you pay.
So which route?
It depends what you fit.
Buy leads if
- You sell full-house installs
- You have reps free this week
- You can see the consent form
- You know how many others get it
Skip bought leads if
- Most of your work is repairs
- The seller won't name its sites
- You aren't registered yet
- You can't call back the same day
Run your own if
- You want every lead to be yours
- You want door work in summer
- You want to pick the jobs
- You plan to be here in 5 years
Plenty of installers do both: appointments from a seller to keep the reps busy this autumn, and their own ads and website so next September the phone rings for them first. Speed matters either way, and the research on how much is in our roofing leads guide.
Our sources
Check our sources, not our word.
We build websites and run Google Ads for trades, so we'd rather you ran your own, and we've still shown where a bought window lead is cheaper. Every seller is quoted in its own words, from its own pages, terms and privacy policy.
Sellers' pages were read on 23 September 2026. Click prices and search volumes are Google Ads data for the UK, pulled the same day. Job prices are from Checkatrade's and MyJobQuote's cost guides. The fines come from the ICO's penalties register and its notices. The building rules come from gov.uk, FENSA and CERTASS.
Straight answers
What installers ask about window leads.
- How much do double glazing leads cost in the UK?
- Lead Pronto is the only seller we found that publishes a price: window and door leads from £15, booked appointments from £130, and it says its prices exclude VAT. Leads 2 Trade asks you to ring for prices, and Watts Marketing, Leads Do Work, Purplex and Fullscale Digital don't publish one. A click on a homeowner's window search in Google costs £3.06 to £18.33, going by Google Ads data for the UK.
- Are double glazing leads exclusive?
- It depends on the tier and on which of the seller's pages you read. Watts Marketing says each appointment "goes to one company and is never sold again". Leads 2 Trade sells four tiers, from one installer up to "4 times", plus a first-come-first-served vault. Lead Pronto tells installers its window leads are "never resold", while its privacy policy tells homeowners their details "may be shared with one or more companies".
- Where do double glazing leads come from?
- Mostly from the sellers' own adverts and comparison websites. Lead Pronto says its window leads come "largely" from Meta and Google Ads. Watts says homeowners enquire through "a consumer brand we own". Leads Do Work lists a network of over 300 websites, including doubleglazing.com and thewindowman.co.uk. BuyerAlerts sells property data for direct mail rather than people who have asked for a quote.
- Do I need FENSA to buy window leads?
- The law doesn't make you join FENSA. gov.uk says replacing windows and doors can need building regulations approval, and that competent person scheme membership "is voluntary - you can still use local council or private inspectors if you prefer." But most sellers make it a condition: Leads 2 Trade needs FENSA, CERTASS, ASSURE or CPA registration, and Watts says the registration sits with you, not with it.
- How many double glazing leads turn into sales?
- Lead Pronto says 12 of every 100 window and door leads its partners work end in a signed order, and 23% book an appointment. That is its own network figure, not an independent one. At its £15 entry price, that works out at about £125 of lead cost for every sale. Leads 2 Trade says conversion "will depend on a number of factors" and gives no figure.
- When do people buy new windows?
- UK searches for "double glazing" peaked in September and were about 2.8 times higher than in August, with a second rise in January. The figures are Google Ads keyword data for September 2025 to August 2026, rounded into bands.
- Is it legal to buy double glazing leads?
- Yes, but the ICO says a business buying marketing data must do proportionate checks and due diligence, and that accepting the seller's assurances isn't enough. Its penalties register lists 8 window and glazing firms fined for unlawful marketing between 2014 and 2024, £770,000 in total. In 2024 Skean Homes was fined £100,000 after blaming its lead generation provider.
Keep reading
More straight answers for trades.
A diary of installs from homeowners who went looking for you.
We build the website and run the Google Ads in your own account, on the window and door jobs you want, so every lead is someone who searched, found you and got in touch. See what it costs, or message us with a question first.