- Companies
- Specialist contractors
- Welwyn
- Ah Support Services Limited
Ah Support Services Limited
- Company number
- 05579598
- Incorporated
- 30 Sep 200521 years trading
- Registered office
- 10 Prospect Place, Welwyn, AL6 9EW
- Nature of business
- Other specialised construction activities n.e.c.; General cleaning of buildings
Ah Support Services Limited is a 21-year-old private limited company registered in Welwyn, company number 05579598, one of 5 specialist construction companies in Welwyn. Its next accounts are due at Companies House on 29 June 2027, and the CT600 for the period to 29 September 2026 is due at HMRC on 29 September 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £16K (+5.5%) on the year before, to £308K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £578K against £283K owed within a year: 2.0 times cover.
- 121 employees on average, up from 111 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £308K | £61K | £578K | £283K | 121 |
| 30 Sep 2024 | £292K | £85K | £534K | £245K | 111 |
| 30 Sep 2023 | £245K | £189 | £554K | £296K | 121 |
| 30 Sep 2022 | £195K | £95K | £588K | £363K | 112 |
| 30 Sep 2021 | £176K | £31K | £539K | £314K | 99 |
| 30 Sep 2020 | £112K | £430K | £711K | £461K | 169 |
| 30 Sep 2019 | £101K | £4,449 | £554K | £439K | 188 |
| 30 Sep 2018 | £174K | £74K | £535K | £337K | 126 |
| 30 Sep 2017 | £140K | £24K | £374K | £275K | 84 |
| 30 Sep 2016 | £135K | £33K | £337K | £251K |
Where Ah Support Services Limited is registered
The registered office is in Welwyn (AL6), in the East Hertfordshire local authority area, England. Show AL6 9EW on a map.
Other trade companies in AL6
- Herts Climate Solutions LtdPlumbers and heating engineers
- Cosmorepairs LtdRepair services
- Little Enterprise Group LtdProperty developers
- Sehiti Plumbing and Heating LtdPlumbers and heating engineers
- LMC Highway Design LtdCivil engineering
- Fox Huhu Trading LimitedBuilders
- Enclosure Zoolutions LtdProperty developers
- G.I. Installation Services LimitedBuilders
Shared registered office
29 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Ah Support Services Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 29 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2027 to 29 Jul 2027 | £150 |
| 1 to 3 months late | 30 Jul 2027 to 29 Sep 2027 | £375 |
| 3 to 6 months late | 30 Sep 2027 to 29 Dec 2027 | £750 |
| More than 6 months late | From 30 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Sep 2027 | £200 |
| 3 months late | 29 Dec 2027 | another £200 |
| 6 months late | 29 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Sep 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 05579598
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 September 2005 (21 years ago)
- Registered office
- 10 Prospect Place, Welwyn, AL6 9EW
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
General cleaning of buildings (SIC 81210) - Year end
- 29 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 30 September 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Welwyn
Other active specialist construction companies registered in Welwyn.
- Cpi Refrigeration Ltd2015
- Crestel Home Access Limited2009
- Flowright Construction Limited2021
- Independent Contract Lifting Services Limited2015
All specialist construction companies in Welwyn · All trades in Welwyn · Specialist contractors across the UK
Frequently asked questions
When are Ah Support Services Limited's accounts due?
Ah Support Services Limited's next accounts are due at Companies House by 29 June 2027 (in 260 days), covering the period to 29 September 2026.
When is Ah Support Services Limited's CT600 due?
The CT600 for the period to 29 September 2026 is due at HMRC by 29 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 June 2027.
Is Ah Support Services Limited still trading?
Ah Support Services Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Ah Support Services Limited do?
Ah Support Services Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); General cleaning of buildings (SIC 81210).
How old is Ah Support Services Limited?
Ah Support Services Limited was incorporated on 30 September 2005, 21 years ago.
What is the penalty if Ah Support Services Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Ah Support Services Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.