Window & double glazing installers in Hertfordshire
456 companies · 61 towns & cities
Hertfordshire has 456 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.
Local climate (2025)
Annual rainfall580mm
Frost days32
Max gust recorded80.6km/h
Temperature range-5° to 31.7°C
580mm of rain and 32 frost days in 2025 (34% less rain than the UK average) — worn seals and single glazing let more of that in here than in a drier county.
Source: Open-Meteo historical archive, 2025 daily readings for Hertfordshire.
Largest towns in Hertfordshire
Watford56 companiesEnfield43 companiesStevenage34 companiesBorehamwood30 companiesSt Albans25 companiesBarnet23 companiesHitchin19 companiesPotters Bar15 companiesWaltham Abbey14 companiesHatfield13 companiesHoddesdon13 companiesWare12 companies
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Watford (56)Enfield (43)Stevenage (34)Borehamwood (30)St Albans (25)Barnet (23)Hitchin (19)Potters Bar (15)Waltham Abbey (14)Hatfield (13)Hoddesdon (13)Ware (12)Welwyn Garden City (11)Biggleswade (9)Hertford (9)Letchworth Garden City (9)Rickmansworth (9)Waltham Cross (9)Bushey (8)Hertfordshire (6)Herts (6)Shefford (6)Buntingford (5)Harpenden (5)London Colney (4)Royston (4)Abbots Langley (3)Chorleywood (3)Kings Langley (3)Letchworth (3)London (3)Nazeing (3)Stanstead Abbotts (3)Welwyn (3)Wheathampstead (3)Baldock (2)Croxley Green (2)Henlow (2)Lower Stondon (2)Sandy (2)Welham Green (2)Arlesey (1)Barnet, London (1)Bassingbourn (1)Bayford (1)Broxbourne (1)Cheshunt (1)Cuffley (1)Goffs Oak (1)Heydon (1)Litlington (1)Meppershall (1)Middlesex (1)New Barnet (1)Nr Hitchin (1)Pindar Road, Hoddesdon (1)Redbourn (1)Sandon (1)Stevenage, Herts (1)Stotfold (1)Stotfold Hitchin (1)