- Companies
- Plumbers and heating engineers
- Swindon
- Thamesdown Heating Ltd
Thamesdown Heating Ltd
- Company number
- 17217321
- Incorporated
- 13 May 2026
- Registered office
- 5 the Heights, Swindon, SN1 4NN
- Nature of business
- Plumbing, heat and air-conditioning installation
Thamesdown Heating Ltd is a newly incorporated private limited company registered in Swindon, company number 17217321, one of 164 plumbing and heating companies in Swindon. Its next accounts are due at Companies House on 13 February 2028, and its first CT600 is due at HMRC on 12 May 2028.
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 Thamesdown Heating Ltd is registered
The registered office is in Swindon (SN1), in the Swindon local authority area, South West. Show SN1 4NN on a map.
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What happens if Thamesdown Heating 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 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 Feb 2028 to 13 Mar 2028 | £150 |
| 1 to 3 months late | 14 Mar 2028 to 13 May 2028 | £375 |
| 3 to 6 months late | 14 May 2028 to 13 Aug 2028 | £750 |
| More than 6 months late | From 14 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 17217321
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 May 2026
- Registered office
- 5 the Heights, Swindon, SN1 4NN
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (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 Swindon
Other active plumbing and heating companies registered in Swindon.
- The Flying Plumber Limited2025
- The Plumbing & Heating Company Limited2015
- The Property Service Swindon Limited2009
- The Swindon Bathroom Company Ltd2022
- Thompson Plumbing Services Limited2016
- Titan Heating & Plumbing Solutions Ltd2020
- Total Heating & Cooling Services Ltd2022
- Total Lane Ltd2026
All plumbing and heating companies in Swindon · All trades in Swindon · Plumbers and heating engineers across the UK
Frequently asked questions
When are Thamesdown Heating Ltd's accounts due?
Thamesdown Heating Ltd's next accounts are due at Companies House by 13 February 2028 (in 488 days), covering the period to 31 May 2027.
When is Thamesdown Heating 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 2027, due by 12 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Thamesdown Heating Ltd still trading?
Thamesdown Heating 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 Thamesdown Heating Ltd do?
Thamesdown Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Thamesdown Heating Ltd?
Thamesdown Heating Ltd was incorporated on 13 May 2026, less than a year ago.
What is the penalty if Thamesdown Heating 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 Thamesdown Heating 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.