Double glazing in Merton covers homes from Wimbledon Village to the St Helier estate in Morden, and Inspired Glazing works right across the borough. We fabricate aluminium windows and doors at our Fifield workshop, near Windsor, fit them with our own team, and also supply UPVC windows, composite doors and conservatories. Merton is roughly 25 to 30 miles from Fifield by road, about an hour’s drive in normal traffic. We have no office in south-west London; we travel from Fifield.

Get a free, fixed-price quote in Merton
Made in our own Fifield workshop and fitted by our own team. Aluminium windows from £400, lead times from 10 days and a 10-year guarantee. Tell us what you need and we’ll book a free survey.
What Merton’s homes look like
Merton Park was laid out by John Innes, a City wine merchant, who bought farmland in 1864 and developed it between 1870 and 1904, taking Bedford Park in Chiswick as a model. Its tree-lined roads of detached and semi-detached houses now form two conservation areas, John Innes Merton Park and John Innes Wilton Crescent.
Wimbledon has its village on the hill, the Broadway and Hill Road below, and conservation areas including Wimbledon North, Wimbledon West, Wimbledon Village, Wimbledon Chase and Copse Hill.
Morden is dominated by the St Helier estate, built by the London County Council between 1928 and 1936 as a garden-city-style overspill estate. The part north of Green Lane and Bishopsford Road is in Merton; the rest is in Sutton. Many homes were bought under right to buy, so window styles vary from door to door.
Mitcham keeps its historic Cricket Green conservation area, with the Wandle Valley running along the borough’s eastern side.
Planning in Merton
Merton Council lists 27 conservation areas, and it points residents to separate Article 4 information for John Innes Merton Park and Wilton Crescent, where the John Innes design guide applies. If your home is in any conservation area, or is listed, check with Merton Council before changing windows or doors. Flats have no householder permitted development rights, and leaseholders will need the freeholder’s consent. Our guide to planning and replacement windows explains when consent is usually needed.
Products that suit the borough
- St Helier and other interwar houses in Morden and Mitcham: UPVC windows made in the Selecta Advance 70 system, and composite front doors, are a tidy, affordable upgrade, available in woodgrain finishes if you want a traditional look.
- Period houses in Wimbledon’s conservation areas and nearby streets: our aluminium windows include the Reynaers SlimLine 68, an outward-opening casement with slim frames, along with Cortizo and Alunet ranges. We do not make timber windows or doors, which matters on streets where the council expects timber.
- Rear extensions: Reynaers ConceptPatio 130 sliding doors, Smart Visofold and Cortizo bifold doors, roof lanterns, and conservatories and orangeries.
- Flats and mansion blocks: secondary glazing fitted inside, where external changes are not possible.
Colliers Wood and the Wandle
The Wandle Valley conservation area follows the river through the east of the borough, past Colliers Wood and Mitcham. Homes along it range from Victorian cottages to modern flats. If you live close to the river, look at the Environment Agency flood map before planning new doors at garden level, and confirm with Merton Council whether your house falls inside the conservation area boundary. We can then design openings and thresholds to suit. For a flat in one of the newer riverside blocks, check with your managing agent first, as external changes almost always need freeholder consent.
Neighbourhoods we cover
Wimbledon, Wimbledon Park, Raynes Park, South Wimbledon, Merton Park, Colliers Wood, Morden, Mitcham and Pollards Hill. Nearby pages: Wandsworth, Kingston upon Thames and Croydon.
A Merton job, start to finish
First we book a survey and bring samples, since our only premises are in Fifield. You then receive a written quote: aluminium windows start from £400, and our double glazing cost guide explains what drives the total. Aluminium frames are built in our workshop with lead times from 10 days. Our own fitters install, take away the old frames and leave the openings finished. Each installation has a 10-year guarantee. We are a listed Reynaers at Home installer partner and hold Constructionline Silver.
One local tip: if you live in north Wimbledon, tell us if your preferred fitting dates fall during the Championships, so we can plan access and parking around the event.

Free survey
Ring 01753 965 005 (Mon to Fri 8am to 6pm, Sat 9am to 1pm), send a WhatsApp to 07934 152 343, or request your quote online.
Frequently asked questions
Do I need permission for new windows in Merton Park?
Probably. John Innes Merton Park and John Innes Wilton Crescent are conservation areas, and Merton Council publishes separate Article 4 information and a John Innes design guide for them. Check with Merton Council for your address before ordering. We can survey and give you drawings and specifications to support any application.
What windows suit a house on the St Helier estate?
St Helier was built by the London County Council between 1928 and 1936, and its simple brick houses suit UPVC windows in the Selecta Advance 70 system with a composite front door. If you want slimmer frames or a darker colour, our aluminium windows start from 400 pounds. Check first if your home is still council-owned or leasehold.
How far do you travel to Wimbledon?
Our workshop is at Fifield, near Windsor, roughly 25 to 30 miles from Wimbledon by road, usually about an hour's drive. We do not have a local office. Our own team travels from Fifield for the survey and fitting, and we plan installation dates to avoid the busiest local events where we can.
Can I replace the windows in my Wimbledon flat?
Flats have no householder permitted development rights, so new windows may need planning permission, particularly in one of Wimbledon's conservation areas. Your lease will also normally require the freeholder's consent. Check with Merton Council and your freeholder first. If outer windows cannot change, secondary glazing fitted inside is a useful alternative.
Do you install bifold doors in Raynes Park extensions?
Yes. We fit Smart Visofold and Cortizo aluminium bifold doors, and Reynaers ConceptPatio 130 sliding doors if you prefer fewer, larger panes. Both suit single-storey rear extensions on Victorian and Edwardian terraces. We measure the structural opening at the free survey and advise on the best configuration and threshold.