All 41 construction companies registered in Welwyn Garden City, Nov 2025 to Oct 2026.
Every construction company that registered a Welwyn Garden City address between November 2025 and October 2026, newest first, straight from the Companies House register. Every company number links to its own record there.
| Company | What it does | Registered |
|---|---|---|
| ARIO BUILDING SERVICES LTD Year end 31 October · first accounts due 30 July 2028Also SIC 41202, Construction of domestic buildings; SIC 43210, Electrical installationNot to be confused with ARIO WORLDWIDE LIMITED (Bromley, 2026), ARIO VENTURES LIMITED (London, 2026), ARIO TECHNOLOGIES AND HOTEL MANAGEMENT LIMITED (London, 2026), and 17 more with “ario” in the name | Construction of commercial buildings · AL8 | 30 October 2026 |
| JADE ELECTRICAL LTD Year end 31 October · first accounts due 13 July 2028 | Electrical installation · AL8 | 13 October 2026 |
| THREE STONES DEVELOPMENTS LTD Year end 31 October · first accounts due 7 July 2028Also SIC 41202, Construction of domestic buildings | Development of building projects · AL7 | 7 October 2026 |
| MECHANICALWISE LTD Year end 30 September · first accounts due 22 June 2028 | Other construction installation · AL7 | 22 September 2026 |
| T&D CONSTRUCTION GROUP LTD Year end 30 September · first accounts due 1 June 2028 | Other building completion and finishing · AL7 | 1 September 2026 |
| AL8 PLUMBING LTD Year end 31 August · first accounts due 17 May 2028Not to be confused with AL8 LIMITED (Huddersfield, 2015) | Plumbing, heat and air-conditioning installation · AL8 | 17 August 2026 |
| VERTEC ROOFING AND BUILDING LTD Year end 31 August · first accounts due 10 May 2028Not to be confused with VERTEC SAFETY LIMITED (Neston, 2026), VERTEC GLOBAL LTD (London, 2026), VERTEC CONSULTING ENGINEERS LTD (Leeds, 2026), and 12 more with “vertec” in the name | Roofing activities · AL7 | 10 August 2026 |
| JSP COMMERCIAL LTD Year end 31 July · first accounts due 22 April 2028Also SIC 70229, Management consultancy activities other than financial management; SIC 74902, Quantity surveying activities; SIC 74909, Other professional, scientific and technical activities n.e.c.Not to be confused with JSP RESIDENTIAL LTD (London, 2026), JSP PROPERTY SERVICES LTD (Rugby, 2026), JSP PROP CO LIMITED (London, 2026), and 161 more with “jsp” in the name | Other specialised construction activities n.e.c. · AL8 | 22 July 2026 |
| IGD ELECTRICAL LTD Year end 31 July · first accounts due 20 April 2028Not to be confused with IGD TRANSPORT LTD (Norwich, 2026), IGD GROUP LTD (Sutton Coldfield, 2025), IGD PRINTS LIMITED (Manchester, 2024), and 20 more with “igd” in the name | Electrical installation · AL7 | 20 July 2026 |
| DELTA CLIMATE SYSTEMS LTD Year end 31 July · first accounts due 9 April 2028Also SIC 35300, Steam and air conditioning supply | Electrical installation · AL7 | 9 July 2026 |
| WORCESTERHENRY LTD Year end 31 July · first accounts due 9 April 2028 | Development of building projects · AL7 | 9 July 2026 |
| LILY INTERIORS LIMITED Year end 30 June · first accounts due 5 March 2028 | Joinery installation · AL7 | 5 June 2026 |
| FALCON GROUP ENGINEERING LTD Year end 30 June · first accounts due 3 March 2028 | Electrical installation · AL7 | 3 June 2026 |
| CREATIVE DRIVEWAY SOLUTIONS LIMITED Year end 31 May · first accounts due 18 February 2028Not to be confused with TOTAL PATIO & DRIVEWAY SOLUTIONS LTD (Bristol, 2026), TJS DRIVEWAY & LANDSCAPING SPECIALIST LTD (Hull, 2026), THE DRIVEWAY PATIO RESIN GROUP LTD (Faringdon, 2026), and 170 more with “driveway” in the name | Development of building projects · AL8 | 18 May 2026 |
| GD JONES PLUMBING & HEATING LIMITED Year end 31 May · first accounts due 7 February 2028 | Plumbing, heat and air-conditioning installation · AL7 | 7 May 2026 |
| BLACKSHIRE SERVICES LTD Year end 31 May · first accounts due 6 February 2028Also SIC 81210, General cleaning of buildingsNot to be confused with BLACKSHIRE GROUP LTD (London, 2025), BLACKSHIRE LIMITED (Newton Longville, 2019), BLACKSHIRE UNITED L.P. (Glasgow, 2017), and 1 more with “blackshire” in the name | Electrical installation · AL7 | 6 May 2026 |
| WELWYN BUILDERS LTD Year end 30 April · first accounts due 28 January 2028Not to be confused with WELWYN RESISTORS LIMITED (Northumberland, 2026), WELWYN MERX HERTFORDSHIRE LIMITED (Croydon, 2026), WELWYN LUXURY BEAUTY LIMITED (Welwyn, 2026), and 205 more with “welwyn” in the name | Construction of domestic buildings · AL7 | 28 April 2026 |
| ETON CREST CONSTRUCTION LTD Year end 30 April · first accounts due 21 January 2028Not to be confused with WINDSOR & ETON GUARDIANS LIMITED (Windsor, 2026), MESSING ETON LTD (Windsor, 2026), ETON VISTA (WESTERHAM) LIMITED (London, 2026), and 272 more with “eton” in the name | Other building completion and finishing · AL7 | 21 April 2026 |
| LT AIR CONDITIONING LIMITED Year end 30 April · first accounts due 19 January 2028 | Plumbing, heat and air-conditioning installation · AL8 | 19 April 2026 |
| CHILLCORE REFRIGERATION AND AIR CONDITIONING LTD Year end 30 April · first accounts due 16 January 2028 | Plumbing, heat and air-conditioning installation · AL7 | 16 April 2026 |
| DATCHWORTH HEATING LTD Year end 30 April · first accounts due 15 January 2028Not to be confused with DATCHWORTH ROOFING LIMITED (Nr Folkestone, 2022), PAWS PLAYFIELD DATCHWORTH LTD (Great Chesterford, 2021), ROSE COTTAGE DATCHWORTH LIMITED (Dunstable, 2017), and 4 more with “datchworth” in the name | Plumbing, heat and air-conditioning installation · AL7 | 15 April 2026 |
| MATT ATKINS PROPERTY SOLUTIONS LTD Year end 30 April · first accounts due 14 January 2028Not to be confused with SJ ATKINS LTD (Brentwood, 2026), R ATKINS ELECTRICAL LIMITED (Stanford le Hope, 2026), LARS ATKINS MARINE SERVICES LTD (St Helens, 2026), and 218 more with “atkins” in the name | Development of building projects · AL7 | 14 April 2026 |
| HERTSSPARKY LTD Year end 30 April · first accounts due 1 January 2028Also SIC 41202, Construction of domestic buildings; SIC 43210, Electrical installation | Construction of commercial buildings · AL8 | 1 April 2026 |
| LOUI GAS SERVICES LTD Year end 31 March · first accounts due 31 December 2027Not to be confused with LOUI'S BAR LTD (Liverpool, 2026), LOUI PLUMBING SERVICES LTD (Welwyn Garden City, 2026), LOUI CREW LTD (Manchester, 2025), and 4 more with “loui” in the name | Other construction installation · AL7 | 31 March 2026 |
| LOUI PLUMBING SERVICES LTD Year end 31 March · first accounts due 29 December 2027Not to be confused with LOUI'S BAR LTD (Liverpool, 2026), LOUI GAS SERVICES LTD (Welwyn Garden City, 2026), LOUI CREW LTD (Manchester, 2025), and 4 more with “loui” in the name | Plumbing, heat and air-conditioning installation · AL7 | 29 March 2026 |
| SARAH JAMES PLASTERING AND DAMP PROOFING LTD Year end 31 March · first accounts due 17 December 2027Not to be confused with SOUTHERN DAMP PROOFING SPECIALISTS LIMITED (Dartford, 2026), SOLAR PANEL BIRD PROOFING NI LTD (Craigavon, 2026), ROOFING AND DAMP PROOFING CONTRACTORS LTD (London, 2026), and 237 more with “proofing” in the name | Floor and wall covering · AL7 | 17 March 2026 |
| VT FLOW PLUMBING & HEATING LTD Year end 31 March · first accounts due 17 December 2027 | Plumbing, heat and air-conditioning installation · AL7 | 17 March 2026 |
| SENTRILINK SECURITY LTD Year end 31 March · first accounts due 16 December 2027Also SIC 80100, Private security activities; SIC 80200, Security systems service activities | Electrical installation · AL7 | 16 March 2026 |
| ARG ELECTRICS LTD Year end 28 February · first accounts due 21 November 2027Not to be confused with NS ARG LIMITED (Sunderland, 2026), MS ARG LTD (London, 2026), AV ARG LTD (Poole, 2026), and 133 more with “arg” in the name | Electrical installation · AL7 | 21 February 2026 |
| LITHIUM GRID LIMITED Year end 31 March · first accounts due 18 November 2027Also SIC 35130, Distribution of electricityNot to be confused with MARINE LITHIUM SYSTEMS LIMITED (Tyn Y Gongl, 2026), LITHIUM SOLUTIONS LIMITED (Wokingham, 2026), LITHIUM LABS LTD (Bury St Edmunds, 2026), and 84 more with “lithium” in the name | Electrical installation · AL7 | 18 February 2026 |
| HAVENWOOD LODGE LTD Year end 28 February · first accounts due 16 November 2027Also SIC 43999, Other specialised construction activities n.e.c.Not to be confused with HAVENWOOD SUPPORTED LIVING LTD (Hayes, 2026), HAVENWOOD STAFFING LTD (Broxbourne, 2026), HAVENWOOD LIVING PROPERTIES LTD (Hornchurch, 2026), and 14 more with “havenwood” in the name | Other construction installation · AL7 | 16 February 2026 |
| FIRE HORSE DEVELOPMENT LTD Year end 31 January · first accounts due 30 October 2027 | Development of building projects · AL7 | 30 January 2026 |
| ZIMT CONSTRUCTION LTD Year end 31 January · first accounts due 29 October 2027Also SIC 41202, Construction of domestic buildings | Construction of commercial buildings · AL7 | 29 January 2026 |
| BUILD UP LTD Year end 31 January · first accounts due 28 October 2027Also SIC 68209, Other letting and operating of own or leased real estate | Construction of domestic buildings · AL7 | 28 January 2026 |
| INHOUSE PROPERTY GROUP LIMITED Year end 31 January · first accounts due 26 October 2027Also SIC 68310, Real estate agencies; SIC 68320, Management of real estate on a fee or contract basis; SIC 74100, specialised design activitiesNot to be confused with MAKING TAX DIGITAL INHOUSE LIMITED (London, 2026), INHOUSE SOFTWARE LIMITED (Liverpool, 2026), INHOUSE OFFICE COFFEE CO LIMITED (Leigh on Sea, 2026), and 69 more with “inhouse” in the name | Development of building projects · AL7 | 26 January 2026 |
| GFR ELECTRICAL LIMITED Year end 31 January · first accounts due 21 October 2027Not to be confused with GFR TRANSPORT LTD (Norwich, 2026), GFR ADVENTURES LTD (London, 2026), BRO SHOP (GFR) LTD (Birmingham, 2026), and 25 more with “gfr” in the name | Electrical installation · AL7 | 21 January 2026 |
| ADBROOK FIRE PROTECTION LTD Year end 31 January · first accounts due 4 October 2027 | Other construction installation · AL7 | 4 January 2026 |
| EFS BUILDING LTD Year end 31 December · first accounts due 28 September 2027Not to be confused with EFS UNCLE EDDIE LTD (London, 2026), EFS TOP CLEAN SERVICES LTD (Harrow, 2026), EFS MEDIA SERVICES LTD (Bury St Edmunds, 2026), and 95 more with “efs” in the name | Other building completion and finishing · AL7 | 28 December 2025 |
| SINGER PROPERTIES LTD Year end 31 December · first accounts due 14 September 2027Not to be confused with SINGER HOLDINGS LTD (Norwich, 2026), CLAIRE SINGER LIMITED (London, 2026), WEDDING SINGER SCHOOL LTD (Havant, 2025), and 86 more with “singer” in the name | Development of building projects · AL7 | 14 December 2025 |
| SAFE IN CONSTRUCTION LTD Year end 31 December · first accounts due 12 September 2027Also SIC 43999, Other specialised construction activities n.e.c.; SIC 70229, Management consultancy activities other than financial management; SIC 74909, Other professional, scientific and technical activities n.e.c. | Construction of domestic buildings · AL7 | 12 December 2025 |
| TOTALFIX MAINTENANCE LTD Year end 30 November · first accounts due 12 August 2027Not to be confused with TOTALFIX PROPERTY MAINTENANCE LTD (London, 2026), TOTALFIX PROJECTS LTD (York, 2026), TOTALFIX APPLIANCES LIMITED (Stourbridge, 2026), and 5 more with “totalfix” in the name | Plumbing, heat and air-conditioning installation · AL8 | 12 November 2025 |
Company names, numbers and incorporation dates come from the Companies House register and are free to reuse under the Open Government Licence. What the register does not carry is a way to contact any of them. That is the part we sell, below.
The longest-running construction companies in Welwyn Garden City.
The list above is the newcomers. These are the construction companies with a Welwyn Garden City address that have been on the register longest and are still live, out of 383 in all. Years are counted from incorporation, so a business that traded before it became a company is older than it looks here.
New companies too: every new company in Hertfordshire, every trade (6,893 across the months we hold), or the UK list for construction below.
April was the busiest month.
Monthly registrations of construction companies in Welwyn Garden City. The busiest month was April on 7. The quietest was November on 1.
New construction companies in Welwyn Garden City, by month
Nov 2025 – Oct 2026 · 41 in total
Small numbers move about. At this volume a quiet month and a busy month in the same year is normal, so read the twelve-month total before you read any single month.
How far back it goes.
Construction companies registered to a Welwyn Garden City address by year of incorporation, and this year measured against the same run of months last year.
New construction companies in Welwyn Garden City, by year
2017 to 2026 · 2026 counts January to October only
Older years undercount. The register only holds companies that still exist. Anything formed in an earlier year and since dissolved has dropped off it, so the further back the chart goes the more it undercounts. That alone makes every trade look like it is growing. Some of the rise here is real growth and some of it is simply that recent companies have had less time to close. The long view works through it in full.
How Welwyn Garden City compares.
New construction companies over the last twelve months in the towns closest to Welwyn Garden City on volume. Welwyn Garden City is number 312 of the 412 towns with enough construction registrations for a page.
42,816 new construction companies, registered March to November 2026. Any month from £55.68.
42,816 construction companies registered across the UK in March to November 2026 are in the file, each with its name, number, registered address, directors and trade. Every company registered, with its website, email and phone number where we can find one. Most companies this new have no website yet, so many rows will be the company, its address and its directors.
National per trade, Welwyn Garden City and everywhere else; filter by town in the file. Any month from £55.68; every month we hold for £1156.03, 10% off. 3p a company, £15 minimum an order. Pick one month, any mix, or everything.
Selling across the UK? See the construction companies across the UK: every one registered from March to November 2026.
Pay by card. Within a minute an email tells you when your file will arrive: usually within a few hours, never more than 48 hours.
Not ready to buy? See a free sample first: the 25 newest construction companies, with each one's registered address and directors, as a CSV. Get the free sample.
Five rows from this list, with an email found
Real companies from the file, picked from the ones we found an email for: most companies this new have none yet. The full file has every column and the whole address. We hide most of each email here, never in the file you buy.
| Company | Town | Registered | Trade | |
|---|---|---|---|---|
| OCEAN SHORE (SW) LTD | St Austell | 13 Aug 2026 | Construction | i•••@ocean-shore.co.uk |
| EIRFLOW LTD | Chesterfield | 30 Apr 2026 | Construction | i•••@eirflow.co.uk |
| MULLINS AIR CONDITIONING SERVICES LTD | Ruislip | 20 Jul 2026 | Construction | i•••@mullinsairconditioningservices.co.uk |
| ALTRIX FACILITIES LTD | London | 18 Jul 2026 | Construction | s•••@altrixfacilities.co.uk |
| REVO CONSTRUCTIONS LTD | Luton | 10 Aug 2026 | Construction | i•••@revoconstructions.co.uk |