Growing a Glazing Business in the UK: A 2026 Guide

The glazing market: segments and opportunities

The UK glazing market breaks into several distinct segments, each with different margins, sales cycles and customer profiles.

Domestic window and door replacement is the highest-volume segment. Homeowners replace windows every 15–25 years, driven by failing seals, energy efficiency improvements or aesthetic upgrades. uPVC dominates the mid-market, aluminium bi-folds and sliders are growing quickly at the premium end, and timber sash remains the preferred choice in conservation areas and period properties. Average job values run from £400 for a single window up to £8,000 for a full house, with most domestic replacement jobs falling in the £2,000–£5,000 range.

Glazing repairs — cracked panes, failed sealed units, broken hinges and handles — are lower in value (£80–£350 per call-out) but high in frequency and excellent for cash flow. Repair customers who get a fast, professional response become replacement customers when their windows reach end of life. Track repair customers and follow up two years later with a replacement quote.

Commercial glazing covers shop fronts, office partitions, curtain walling and glass balustrades. The sales cycle is longer and the compliance requirements more demanding, but the job values are significantly higher — a shop front reglaze can run £3,000–£15,000, and a commercial office refit can be £50,000+. Commercial work tends to come through tender or relationship with property managers and fit-out contractors.

Conservatory and orangery glazing is a niche but profitable segment. Glass roofs, lanterns and bespoke conservatory refurbishments can run £4,000–£20,000. The customers are typically homeowners investing in their property and are less price-sensitive than standard window replacement buyers.

FENSA registration: compliance and marketing tool

FENSA (Fenestration Self-Assessment) registration is a legal requirement for glazing contractors who replace windows or doors in England and Wales in situations that require Building Regulations compliance. In practice, this means almost all domestic window and door replacement work.

Without FENSA registration (or an equivalent scheme such as CERTASS), you cannot self-certify your installations and the customer must obtain a Building Regulations completion certificate from their local authority — which costs money and causes delays at conveyancing. Most domestic customers are unaware of this until it becomes a problem; FENSA-registered contractors avoid the issue entirely.

From a marketing perspective, FENSA registration signals professionalism and compliance. Display your FENSA number prominently on your website, quotes and vehicles. At point of sale, explain to the customer that FENSA certification protects them if they ever sell their home — the solicitor will ask for it. This turns a compliance requirement into a competitive advantage over unregistered competitors.

Pricing glazing work correctly

Glazing pricing varies significantly by specification, glass type and frame material. These benchmarks apply to supply-and-fit jobs in 2026:

• uPVC casement window (standard size, double glazed): £450–£700 supply and fit
• uPVC bay window (3-pane): £1,200–£1,800 supply and fit
• Aluminium bi-fold doors (3-panel, 2.1m high): £2,800–£4,500 supply and fit
• Triple glazing uplift over double: typically 25–35% premium on unit cost
• Emergency glazing call-out (boarding up or temporary glaze): £150–£350 + materials
• Failed sealed unit replacement (supply and fit): £120–£280 per unit

Materials typically account for 45–55% of the job value on supply-and-fit work, with labour and overheads making up the remainder. If you are sourcing from a trade fabricator rather than manufacturing yourself, negotiate volume discounts early — even a 5% improvement in materials cost has a significant impact on margin at scale.

Getting insurance work: emergency glazing for property insurers

Emergency glazing — boarding up or reglasing after break-ins, storm damage or accidents — is high-margin, fast-payment work. Most emergency glazing is paid by property insurers, which means prompt payment and minimal price negotiation.

The route into insurance work is through Third Party Administrators (TPAs) — companies like Domestic & General, Cunningham Lindsey and Crawford that manage claims on behalf of insurers. To get onto a TPA network, you need to demonstrate 24/7 availability, professional indemnity insurance, FENSA registration and a clean claims history. The application process is straightforward but competitive.

Once on a TPA network, work flows automatically — you receive job notifications by text or app, attend within a target response time (usually 2–4 hours for emergency board-ups), complete the work and submit an invoice. Payment terms are typically 30–45 days. The margins on TPA work are lower than direct domestic work, but the volume and cash flow predictability make it valuable as a baseline.

New-build glazing: getting onto developer supply lists

Volume new-build glazing contracts — supplying and fitting windows and doors on housing developments — offer high revenue per month but require specific capabilities: consistent quality across multiple units, flexible scheduling, the ability to work alongside other trades and competitive pricing on volume orders.

The route in is through the developer's procurement team or, on smaller sites, directly through the site manager. Start by approaching smaller developers (10–50 units) where the volume is manageable and the decision-maker is more accessible. Have your FENSA registration, public liability certificate and product specifications ready.

Pricing for new-build work is typically lower per unit than domestic replacement (developers negotiate hard), but the labour efficiency is significantly better — fitting 20 identical windows on the same site is faster than 20 different domestic jobs. Margins of 20–28% are achievable on new-build if you manage material procurement well.

Marketing your glazing business

Google Ads targeting “double glazing [city]” and “glazier near me” is the highest-ROI paid channel for most glazing businesses. These are high-intent searches — someone searching for a glazier near them has an immediate need. Expect cost-per-click of £1.50–£4.00 and cost-per-booked-job of £35–£80 with a well-optimised campaign.

Google Local Services Ads (the “Google Guaranteed” badge) appear above standard paid ads and generate significantly higher click-through rates. Apply for LSA as a priority — the verification process takes 2–4 weeks but the quality of leads is higher and the cost-per-lead is often lower than standard search ads.

Checkatrade and MyBuilder generate leads but at a higher cost per job than Google for most glaziers. Use them for brand visibility and reviews rather than as your primary lead generation channel. Direct referrals — from satisfied customers and trade contacts — are your lowest-cost channel and should be actively cultivated with a follow-up message after every completed job.

Managing your glazing business with Trade2Base

Trade2Base handles the operational and marketing measurement needs that growing glazing businesses run into as they scale past the “one van, manual invoices” stage.

• FENSA certificate storage: attach FENSA documentation to each job record so customers and solicitors can access it instantly from the customer portal
• Customer portal: customers can download their FENSA certificate, view job history and make payments online — reducing admin calls by 60%+
• Stripe payment: collect deposits and final payments by card link — no chasing BACS, no missed payments
• Campaign attribution: tag every enquiry with its source (Google LSA, Facebook, Checkatrade, referral) and see cost-per-booked-job by channel so you know exactly where to invest your marketing budget

Attribution data is where most glazing businesses find immediate value. If Checkatrade is costing you £165 per booked job and Google LSA is costing £41, you have an immediate decision to make about budget allocation. Without tracking, most businesses overspend on the wrong channels for years.