- Companies
- Civil engineering
- Penryn
- SW Utilities & Leak Detection Ltd
SW Utilities & Leak Detection Ltd
- Company number
- 16669528
- Incorporated
- 24 Aug 20251 year trading
- Registered office
- 31 Kingston Way, Mabe Burnthouse, Penryn, TR10 9FD
- Nature of business
- Construction of utility projects for electricity and telecommunications
SW Utilities & Leak Detection Ltd is a 1-year-old private limited company registered in Penryn, company number 16669528, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 24 May 2027, and its first CT600 is due at HMRC on 23 August 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where SW Utilities & Leak Detection Ltd is registered
The registered office is in Penryn (TR10), in the Cornwall local authority area, South West. Show TR10 9FD on a map.
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Also registered at this address
1 other company uses the same registered office as SW Utilities & Leak Detection Ltd.
- Cornwall Exterior Cleaning LtdCleaning companies
What happens if SW Utilities & Leak Detection 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 24 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 25 May 2027 to 24 Jun 2027 | £150 |
| 1 to 3 months late | 25 Jun 2027 to 24 Aug 2027 | £375 |
| 3 to 6 months late | 25 Aug 2027 to 24 Nov 2027 | £750 |
| More than 6 months late | From 25 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 16669528
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 August 2025 (1 year ago)
- Registered office
- 31 Kingston Way, Mabe Burnthouse, Penryn, TR10 9FD
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Penryn
Other active civil engineering contractors registered in Penryn.
All civil engineering contractors in Penryn · All trades in Penryn · Civil engineering across the UK
Frequently asked questions
When are SW Utilities & Leak Detection Ltd's accounts due?
SW Utilities & Leak Detection Ltd's next accounts are due at Companies House by 24 May 2027 (in 222 days), covering the period to 31 August 2026.
When is SW Utilities & Leak Detection Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 23 August 2026, due by 23 August 2027, and one for the period to 31 August 2026, due by 31 August 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is SW Utilities & Leak Detection Ltd still trading?
SW Utilities & Leak Detection Ltd is listed as active on the Companies House register (checked 14 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 SW Utilities & Leak Detection Ltd do?
SW Utilities & Leak Detection Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is SW Utilities & Leak Detection Ltd?
SW Utilities & Leak Detection Ltd was incorporated on 24 August 2025, 1 year ago.
What is the penalty if SW Utilities & Leak Detection 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 SW Utilities & Leak Detection Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 14 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.