Window & double glazing installers in Norfolk

122 companies · 17 towns & cities

Norfolk has 122 active window and glazing businesses on the Companies House register. Choose a town below to see the companies listed there, or request free quotes from FENSA or Certass registered installers covering your postcode.

Why Norfolk homeowners are upgrading their windows

Norfolk took 515mm of rain and 17 frost days in 2025 — the freeze / thaw cycles that lift seals, warp frames and let moisture creep in behind old glazing. Across the county's 404,341 households, 86% live in a house (detached, semi or terraced) — that's a lot of Norfolk homes with 8 – 12 windows each, most fitted with early double-glazing units that are well past their sealed-argon life.

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Free quotes below from FENSA / Certass installers active in Norfolk — no obligation, most respond within 48 hours.

Rainfall515mm

Frost days17

Peak gust103.3km/h

Temp range-3.9° to 29.2°C

Households404,341

Houses (det + semi + terraced)86%

Flats10.2%

Weather: Open-Meteo historical archive, 2025 daily readings for Norfolk.Housing: ONS Census 2021 (tables TS041 households, TS044 accommodation type), aggregated across Norfolk's local authorities.

Largest towns in Norfolk

Norwich67 companies Lowestoft14 companies Dereham7 companies Wymondham7 companies Great Yarmouth6 companies Attleborough5 companies Norfolk4 companies Fakenham2 companies Hopton2 companies Beccles1 company Besthorpe1 company Chedgrave1 company

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All towns in Norfolk

Norwich (67)Lowestoft (14)Dereham (7)Wymondham (7)Great Yarmouth (6)Attleborough (5)Norfolk (4)Fakenham (2)Hopton (2)Beccles (1)Besthorpe (1)Chedgrave (1)Old Buckenham (1)Snetterton (1)Suffolk (1)Tivetshall St Mary (1)Wymomdham (1)