- Companies
- Plumbers and heating engineers
- Slough
- CPSP Leak Detection Ltd
CPSP Leak Detection Ltd
- Company number
- 16640281
- Incorporated
- 11 Aug 20251 year trading
- Registered office
- C/O Taxassist Accountants 635 Bath Road, Burnham, Slough, Berkshire, SL1 6AE
- Nature of business
- Plumbing, heat and air-conditioning installation; Other professional, scientific and technical activities n.e.c.
CPSP Leak Detection Ltd is a 1-year-old private limited company registered in Slough, company number 16640281, one of 128 plumbing and heating companies in Slough. Its next accounts are due at Companies House on 11 May 2027, and its first CT600 is due at HMRC on 10 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.
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Where CPSP Leak Detection Ltd is registered
The registered office is in Slough (SL1), in the Slough local authority area, South East. Show SL1 6AE on a map.
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- Westside Automotive LtdMotor traders
- Shadeworks LtdInstallers
- Yad Building Services LimitedBuilders
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Also registered at this address
12 other companies use the same registered office as CPSP Leak Detection Ltd.
- Colsen Industries LimitedMotor traders
- Crown Marble LtdInstallers
- F & H Projects LtdElectricians
- KLS Lawns LtdLandscapers and gardeners
- Kyman Construction LimitedFinishing trades
- Louis Hopkins Building LtdSpecialist contractors
- O'Reilly Plastering LimitedPlasterers
- O.W.Francis LtdElectricians
- SJS Rams LtdMachinery repair and installation
- Smart A/C Solutions LtdPlumbers and heating engineers
- UK Leak Detection LimitedProperty developers
- Winterhouse Development LimitedBuilders
What happens if CPSP 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 11 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 12 May 2027 to 11 Jun 2027 | £150 |
| 1 to 3 months late | 12 Jun 2027 to 11 Aug 2027 | £375 |
| 3 to 6 months late | 12 Aug 2027 to 11 Nov 2027 | £750 |
| More than 6 months late | From 12 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
- 16640281
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 August 2025 (1 year ago)
- Registered office
- C/O Taxassist Accountants 635 Bath Road, Burnham, Slough, Berkshire, SL1 6AE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Slough
Other active plumbing and heating companies registered in Slough.
- CRJ Installations Ltd2011
- D S Plumbing Heating & Gas Services Limited2025
- Dan Horton Plumbing and Heating Limited2024
- Doctor Heat Ltd2023
- DS Heating & Plumbing Ltd2018
- Du Plumbing & Heating Ltd2025
- Easyplumbing and Drainage Ltd2024
- Eco Green Home Grants Ltd2020
All plumbing and heating companies in Slough · All trades in Slough · Plumbers and heating engineers across the UK
Frequently asked questions
When are CPSP Leak Detection Ltd's accounts due?
CPSP Leak Detection Ltd's next accounts are due at Companies House by 11 May 2027 (in 211 days), covering the period to 31 August 2026.
When is CPSP 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 10 August 2026, due by 10 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 CPSP Leak Detection Ltd still trading?
CPSP Leak Detection 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 CPSP Leak Detection Ltd do?
CPSP Leak Detection Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is CPSP Leak Detection Ltd?
CPSP Leak Detection Ltd was incorporated on 11 August 2025, 1 year ago.
What is the penalty if CPSP 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 CPSP 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 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.