- Companies
- Plumbers and heating engineers
- Northolt
- CSN Plumbing Specialist Ltd
CSN Plumbing Specialist Ltd
- Company number
- 16447358
- Incorporated
- 13 May 20251 year trading
- Registered office
- 28 Newmarket Avenue, Northolt, UB5 4HA
- Nature of business
- Plumbing, heat and air-conditioning installation
CSN Plumbing Specialist Ltd is a 1-year-old private limited company registered in Northolt, company number 16447358, one of 36 plumbing and heating companies in Northolt. Its next accounts are due at Companies House on 13 February 2027, and its first CT600 is due at HMRC on 12 May 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 CSN Plumbing Specialist Ltd is registered
The registered office is in Northolt (UB5), in the Ealing local authority area, London. Show UB5 4HA on a map.
Other trade companies in UB5
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- Harmony Buildworks LtdSpecialist contractors
- RBS Homes LtdFinishing trades
- Tda Construction LimitedBuilders
- Ivaan Roofing Solutions LtdRoofers
- Jacob Fleet Services LtdMotor traders
- Upliftcarsltd LtdMotor traders
- Caraze LtdMotor traders
What happens if CSN Plumbing Specialist 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 13 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 Feb 2027 to 13 Mar 2027 | £150 |
| 1 to 3 months late | 14 Mar 2027 to 13 May 2027 | £375 |
| 3 to 6 months late | 14 May 2027 to 13 Aug 2027 | £750 |
| More than 6 months late | From 14 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 16447358
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 May 2025 (1 year ago)
- Registered office
- 28 Newmarket Avenue, Northolt, UB5 4HA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 12 May 2026
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 Northolt
Other active plumbing and heating companies registered in Northolt.
- Eri Ltd2015
- Fix Right Plumbing & Heating Ltd2025
- Fixhero Limited2025
- G&S Plumbing Ltd2021
- Gaslocal Ltd2020
- Harken Heating Ltd2021
- Hill & Co Renovations Ltd2026
- Hometech Plumbing & Heating Limited2021
All plumbing and heating companies in Northolt · All trades in Northolt · Plumbers and heating engineers across the UK
Frequently asked questions
When are CSN Plumbing Specialist Ltd's accounts due?
CSN Plumbing Specialist Ltd's next accounts are due at Companies House by 13 February 2027 (in 123 days), covering the period to 31 May 2026.
When is CSN Plumbing Specialist 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 12 May 2026, due by 12 May 2027, and one for the period to 31 May 2026, due by 31 May 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is CSN Plumbing Specialist Ltd still trading?
CSN Plumbing Specialist Ltd 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 CSN Plumbing Specialist Ltd do?
CSN Plumbing Specialist Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is CSN Plumbing Specialist Ltd?
CSN Plumbing Specialist Ltd was incorporated on 13 May 2025, 1 year ago.
What is the penalty if CSN Plumbing Specialist 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 CSN Plumbing Specialist Ltd 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.