- Companies
- Plumbers and heating engineers
- Isleworth
- S Knight Services Ltd
S Knight Services Ltd
- Company number
- 16639769
- Incorporated
- 10 Aug 20251 year trading
- Registered office
- 450 London Road, Isleworth, TW7 5AD
- Nature of business
- Plumbing, heat and air-conditioning installation
S Knight Services Ltd is a 1-year-old private limited company registered in Isleworth, company number 16639769, one of 29 plumbing and heating companies in Isleworth. Its next accounts are due at Companies House on 10 May 2027, and its first CT600 is due at HMRC on 9 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 S Knight Services Ltd is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 5AD on a map.
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What happens if S Knight Services 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 10 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 May 2027 to 10 Jun 2027 | £150 |
| 1 to 3 months late | 11 Jun 2027 to 10 Aug 2027 | £375 |
| 3 to 6 months late | 11 Aug 2027 to 10 Nov 2027 | £750 |
| More than 6 months late | From 11 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
- 16639769
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 August 2025 (1 year ago)
- Registered office
- 450 London Road, Isleworth, TW7 5AD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- 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 Isleworth
Other active plumbing and heating companies registered in Isleworth.
- Smart Home Gas Ltd2021
- Stay Warmer Ltd2026
- Sura Heating and Plumbing Ltd2021
- TMD Air Conditioning Ltd2026
- Virtue Drainage Ltd2024
- A.J. Kitt Plumbing + Heating Services Limited2004
- Advanced Air Conditioning Limited2007
- Art Plumbing Limited2022
All plumbing and heating companies in Isleworth · All trades in Isleworth · Plumbers and heating engineers across the UK
Frequently asked questions
When are S Knight Services Ltd's accounts due?
S Knight Services Ltd's next accounts are due at Companies House by 10 May 2027 (in 210 days), covering the period to 31 August 2026.
When is S Knight Services 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 9 August 2026, due by 9 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 S Knight Services Ltd still trading?
S Knight Services 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 S Knight Services Ltd do?
S Knight Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is S Knight Services Ltd?
S Knight Services Ltd was incorporated on 10 August 2025, 1 year ago.
What is the penalty if S Knight Services 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 S Knight Services 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.