Window & double glazing installers in Essex

938 companies · 78 towns & cities

Essex has 938 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 Essex homeowners are upgrading their windows

Essex took 545mm of rain and 31 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 771,193 households, 80% live in a house (detached, semi or terraced) — that's a lot of Essex 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 Essex — no obligation, most respond within 48 hours.

Rainfall545mm

Frost days31

Peak gust86.4km/h

Temp range-4.1° to 32.8°C

Households771,193

Houses (det + semi + terraced)80%

Flats16.1%

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

Largest towns in Essex

Romford121 companies Basildon65 companies Colchester65 companies Dagenham65 companies Grays42 companies Brentwood39 companies Harlow37 companies Southend On Sea37 companies Chelmsford36 companies Hornchurch36 companies Leigh On Sea34 companies Benfleet26 companies

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All towns in Essex

Romford (121)Basildon (65)Colchester (65)Dagenham (65)Grays (42)Brentwood (39)Harlow (37)Southend On Sea (37)Chelmsford (36)Hornchurch (36)Leigh On Sea (34)Benfleet (26)Braintree (25)Billericay (21)Sudbury (18)Essex (17)Rochford (17)South Ockendon (16)Wickford (16)Rainham (12)Stanford-le-hope (12)Halstead (11)Bishop's Stortford (10)Rayleigh (10)Epping (9)Tilbury (9)Upminster (9)Burnham On Crouch (8)Canvey Island (8)Maldon (8)Sawbridgeworth (7)Ongar (6)Witham (6)Bishops Stortford (4)Clacton-on-sea (4)Dunmow (4)Harwich (4)London (4)Purfleet (4)Spellbrook (3)West Horndon (3)Chadwell Heath (2)Danbury (2)East Tilbury (2)Elmstead Market (2)Great Dunmow (2)Great Hallingbury (2)Herts (2)Hockley (2)Manningtree (2)Old Harlow (2)Shoeburyness (2)Suffolk (2)Westcliff On Sea (2)24a Crown Street Brentwood (1)Battlesbridge (1)Broxted (1)Bulphan (1)Dagengham (1)Essex, Southend On Sea (1)Frinton-on-sea (1)Ingatestone (1)Magdalen Laver (1)Middleton, Sudbury (1)North Weald (1)Pilgrims Hatch (1)Purfleet-on-thames (1)Rawreth Lane (1)Silks Way Braintree (1)Southminster (1)Stansted (1)Surrey (1)Theydon Bois (1)Thorpe Bay (1)Upminister (1)West Cliff On Sea (1)West Hordon (1)Wiltham (1)