{"source":"Breaknorm","page":"https://breaknorm.co/market/property_construction/locksmiths_doors_and_glazing/gb","license":"https://breaknorm.co/terms","vertical":"property_construction","subvertical":"locksmiths_doors_and_glazing","country":"GB","companies":20438,"by_leaf":[["window_door_installers",7408],["glaziers",6123],["locksmiths",5749],["garage_and_industrial_doors",2336],["general_door_window_and_security_fitters",1403],["blinds_shutters_installers",602],["other_specialist_building_services_contractors",111],["window_cleaning",108],["painting_and_decorating",85],["multi_trade_renovation",64],["carpentry_timber_construction",53],["security_system_installers",50],["other_locksmiths_doors_and_glazing",46],["kitchen_bathroom_fitters",38],["other_building_finishing_contractors",37],["general_building_contractors",31],["roofing_contractors",20],["interior_furnishing",12],["heritage_restoration_contractors",10],["joint_and_firestop_sealing",10]],"by_headcount":[["2-10",16211],["0-1",3511],["11-50",639],["51-200",60],["201-500",16],["1001-5000",1]],"by_city":[["Mansfield",553],["Little Thurrock",278],["London",258],["Glasgow",106],["Bristol",105],["Birmingham",97],["Kelvedon Hatch",74],["Grays",70],["Rode",70],["Leeds",62],["Kampong Tanjong Chat",45],["Edinburgh",43]],"hiring":{"companies":37,"new_30d":2,"by_headcount":[["11-50",13],["2-10",10],["51-200",10],["201-500",4]]},"tech":[["cloudflare",6616],["microsoft_365",2332],["google_workspace",1529],["microsoft_teams",963],["mailchannels",558],["facebook_pixel",550],["microsoft_entra_id",501],["microsoft_intune",499],["cloudflare_email_routing",414],["opensrs_hosted_email",409]],"top_note":"The largest companies of the segment, by headcount; job boards and portals left out.","top":[{"domain":"amberwindows.co.uk","name":"Amber Windows","country":"GB","city":null,"headcount":"201-500","leaf":"window_door_installers","summary":"Amber Windows is a window and door contractor in the Midlands that fits and supplies uPVC windows, doors, conservatories and fascias and guttering."},{"domain":"firsthomeimprovements.co.uk","name":"First Home Improvements","country":"GB","city":"Coventry","headcount":"201-500","leaf":"window_door_installers","summary":"First Home Improvements is a UK double glazing and home improvement contractor that installs windows, doors, conservatories and roofline work for homeowners."},{"domain":"sehbac.com","name":"SEH BAC","country":"GB","city":"Whitton","headcount":"201-500","leaf":"window_door_installers","summary":"SEH BAC is a windows, doors and home-improvement supplier that provides uPVC and aluminium windows, doors, conservatories, extensions, roofs and garage doors fo."},{"domain":"lancashiredoubleglazing.co.uk","name":"Lancashire Double Glazing Group Ltd","country":"GB","city":"Preston","headcount":"201-500","leaf":"glaziers","summary":"Lancashire Double Glazing Group Ltd is a double-glazing contractor that supplies and installs windows, doors and conservatories across Lancashire and surroundin."}],"as_of":"2026-11-04","updated_at":"2026-11-03","hash":"3ad00b91b6430fe9","index_tier":2}