- Companies
- Groundworks and demolition
- Covent Garden
- Site Assistance UK Ltd
Site Assistance UK Ltd
- Company number
- 15427426
- Incorporated
- 19 Jan 20242 years trading
- Registered office
- 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ
- Nature of business
- Demolition; Site preparation; Other construction installation
Site Assistance UK Ltd is a 2-year-old private limited company registered in Covent Garden, company number 15427426, one of 41 groundworks and demolition companies in Covent Garden. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Site Assistance UK Ltd is registered
The registered office is in Covent Garden (WC2H), in the Camden local authority area, London. Show WC2H 9JQ on a map.
Other trade companies in WC2H
- Superclean Agency LtdCleaning companies
- Sal Cleaning LtdCleaning companies
- Cityshine Facilities Services LtdCleaning companies
- Pureoceanscleaning LtdCleaning companies
- Muca Property Group LimitedProperty developers
- E.L.G.G LtdJoiners and carpenters
- First Ascentia Integrated LtdCleaning companies
- Fixing London LtdSpecialist contractors
Shared registered office
4,529 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 Site Assistance UK Ltd 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 15427426
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 January 2024 (2 years ago)
- Registered office
- 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ
- Nature of business
- Demolition (SIC 43110)
Site preparation (SIC 43120)
Other construction installation (SIC 43290) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 8 August 2026
Filing notes for groundworks and demolition companies
Groundworks and demolition companies tend to own heavy plant, so capital allowances and hire purchase liabilities show up in both the accounts and the CT600.
Similar companies in Covent Garden
Other active groundworks and demolition companies registered in Covent Garden.
- SMS Global Trading Limited2026
- Solarserv 360 Ltd2025
- The Demo Squad Limited2025
- Vantor Crew Ltd2025
- Waterfront Facilities Management Ltd2025
- Willow Contracting Ltd2026
- Boswell Siteworks Ltd2026
- Complete Crew Hire Limited2026
All groundworks and demolition companies in Covent Garden · All trades in Covent Garden · Groundworks and demolition across the UK
Frequently asked questions
When are Site Assistance UK Ltd's accounts due?
Site Assistance UK Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Site Assistance UK Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Site Assistance UK Ltd still trading?
Site Assistance UK Ltd is listed as active on the Companies House register (checked 12 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 Site Assistance UK Ltd do?
Site Assistance UK Ltd is registered under Demolition (SIC 43110); Site preparation (SIC 43120); Other construction installation (SIC 43290).
How old is Site Assistance UK Ltd?
Site Assistance UK Ltd was incorporated on 19 January 2024, 2 years ago.
What is the penalty if Site Assistance UK Ltd 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 Site Assistance UK Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.