How Much Does a Window Fitter Really Cost?

Supply and fit a standard double-glazed window with one opening panel. This is the most common window type in UK homes — it can open from the top or from the side. All modern replacements are double-glazed with good energy ratings as standard. Price includes removing and disposing of the old window, fitting new trim around the inside, and sealing the outside.

Supply and fit a wider double-glazed window with two opening panels side by side. Common in living rooms and bedrooms where you need a bigger window. Both panels open independently, and on first floors one usually needs to open wide enough to escape in a fire. Includes new trim and all sealing.

Supply and fit a three-panel double-glazed bay window. Bay windows stick out from the wall, usually with a fixed centre pane and two opening side panels at an angle. Price typically includes structural support, the small roof over the bay, and all internal finishing. This is a bigger job than a flat window because of the angles and weatherproofing involved.

Supply and fit a plastic (uPVC) sliding sash window with double glazing, designed to look like traditional Victorian or Edwardian windows but with much less maintenance. The panels slide up and down like old-style sash windows. A good option if you want the classic look without repainting every few years. Note: if your home is in a conservation area, you may need to use timber instead — check with your council first.

Supply and fit a real wooden sliding sash window with double glazing. Timber sash windows are often required in conservation areas or listed buildings where plastic windows are not allowed. They are made to measure and arrive pre-painted. Hardwood options last longer but cost more than softwood. Expect to repaint them every 5-8 years.

Supply and fit a pair of double-glazed French doors that open outward (or inward) from the centre. Popular for opening onto a garden or patio. Price includes a new frame, sill, internal trim, multi-point locks, and all handles. Available in white or coloured finishes, though non-white options cost more.

Supply and fit double-glazed sliding patio doors. One panel slides behind the other, making them ideal where you do not have room for doors to swing open. Available in 2, 3, or 4 panel sizes. Wider openings cost more because of the bigger glass panels and heavier frames. Includes secure locking, new sill, and internal finishing.

Supply and fit 3-panel aluminium bi-fold doors with double glazing. These fold open like a concertina to create a wide opening between your home and garden. Aluminium frames are slimmer than plastic ones, giving you more glass and a modern look. Price includes the structural beam above the opening (if needed), threshold, secure locking, and all finishing. Plastic bi-folds are 20-30% cheaper but have thicker frames.

Supply and fit a composite front door with a new frame, multi-point locks, and all handles. Composite doors have a solid core with a tough outer skin, making them more secure, better insulated, and longer-lasting than standard plastic doors. Available in a wide range of styles, colours, and glass designs. Look for doors with a security rating approved by police and insurers (often called 'Secured by Design').

Supply and fit all windows in a typical 3-bedroom house (approximately 8 standard double-glazed windows). Price includes removing all old windows, fitting new trim, sealing, and a FENSA certificate (this proves the work meets building regulations — you will need it if you sell the house). Beware of pressure-selling window companies that quote eight to twelve thousand pounds for this same work — the realistic market rate is three and a half to six and a half thousand. Common high-pressure tactics include fake 'manager discounts' on the spot, limited-time pricing, and claiming you qualify for government grants you may not be eligible for. Always get at least three quotes from local FENSA-registered installers and never sign on the first visit.

Replace just the glass panel inside an existing window frame — the frame stays in place. This is usually needed when you can see condensation or misting trapped between the two panes (meaning the seal has failed) or when the glass is cracked. Much cheaper than replacing the whole window.

Fit an extra panel of glass or clear plastic on the inside of an existing window to improve insulation and reduce noise. This does not replace the original window, which makes it popular in listed buildings or conservation areas where you are not allowed to change the windows. The extra panel can be fixed, sliding, or hinged so you can still open it.

Supply and fit a roof window (commonly called a Velux) including the weatherproof surround. The fitter cuts a hole in the roof, removes tiles, and fits the window between the rafters. Price assumes a straightforward installation without any structural changes needed. Electric or solar-powered versions that open by remote cost more but are worth it if the window is hard to reach.

Fix a window that will not close properly, lock securely, or has a broken handle. Common repairs include replacing hinges, fitting new handles, fixing or replacing the locking mechanism, and re-aligning panels that have dropped. Much cheaper than a full window replacement and usually done in a single visit.