How much do new windows cost?

Window costs vary depending on size, frame type (uPVC, aluminium), and glazing (double or triple). We provide free, no-obligation quotes tailored to your home. Call for a specific estimate.

How long does installation take?

Most window and door installations take 1-3 days depending on the scope. Conservatories and larger projects may take longer. We'll confirm timelines in your quote.

What warranty do you offer?

We provide a 10-year warranty on all installations and workmanship. Your satisfaction is guaranteed, or we'll fix it free.

How far do you travel?

We serve Hertfordshire, Bedfordshire, Buckinghamshire and Cambridgeshire. Don't see your town? Call us — we're happy to discuss coverage for the right project.

Are you fully insured?

Absolutely. We carry full insurance covering all work, public liability, and employer's liability. Your home and family are protected.

How Much Does Window Replacement Cost in 2026?

Quick answer: Replacing a standard uPVC window typically costs £300–£600 per window fully installed in 2026. A full house replacement of 8–10 windows typically costs £3,000–£6,000. Get a free no-obligation quote — call 07746 246389.

What Affects the Cost?

Number of windows — The more windows you replace at once, the lower the cost per window tends to be — you save on labour and call-out costs.

Window size — Larger windows cost more than standard casement windows. Bay windows, floor-to-ceiling windows and large picture windows all carry a premium.

Style — Casement windows are the most common and affordable. Tilt-and-turn, sliding sash, bay windows and bow windows all cost more.

Material — uPVC is the most affordable option. Aluminium costs more but offers slimmer sightlines and a more contemporary appearance.

Glazing — Double glazing is standard. Triple glazing costs more but provides better insulation and noise reduction. Specialist glass (toughened, obscure, Georgian bar) adds to the price.

Colour — Standard white uPVC is the most affordable. Foiled colours — grey, black, anthracite, cream — typically add 10–20% to the cost.

Typical Price Guide (2026)

Window Type	Typical Cost (installed)
Standard casement (uPVC)	£300–£500
Tilt-and-turn (uPVC)	£400–£650
Sliding sash (uPVC)	£550–£900
Bay window (uPVC, 3-panel)	£1,200–£2,000
Casement (aluminium)	£500–£900
Full house (8–10 windows)	£3,000–£6,000

Prices are approximate guides for the Herts, Beds, Bucks & Cambs area. Actual prices depend on your specific requirements — contact us for a free no-obligation quote.

Signs Your Windows Need Replacing

Draughts around the frame even when closed
Condensation or misting between the panes
Difficulty opening, closing or locking
Visible rot, warping or cracking in the frame
Cold spots near the windows despite heating being on
Significant outside noise getting through
Windows more than 20 years old

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Serving Hertfordshire, Bedfordshire, Buckinghamshire and Cambridgeshire. No obligation, no pressure.

View Our Windows Call 07746 246389

Frequently Asked Questions

How much does it cost to replace windows in the UK?

Window replacement costs in the UK typically range from £300–£600 per window for standard uPVC casement windows, fully installed. The total cost for a whole house depends on the number, size and style of windows. Contact Hewitts for a free no-obligation quote.

Is it worth replacing old windows?

Yes — replacing old or failed windows significantly reduces heat loss, lowers energy bills, improves security and noise reduction, and increases your home's value and kerb appeal. Modern A+ rated windows are far more efficient than windows fitted more than 15 years ago.

How long does window replacement take?

Most window replacements are completed in a single day. A full house replacement may take two days. We work efficiently and always leave your home clean and tidy.

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