- Companies
- Plumbers and heating engineers
- Mildenhall
- Sentry Heat Ltd
Sentry Heat Ltd
- Company number
- 16721973
- Incorporated
- 16 Sep 20251 year trading
- Registered office
- Unit A, 82 James Carter Road, Mildenhall, IP28 7DE
- Nature of business
- Plumbing, heat and air-conditioning installation
Sentry Heat Ltd is a 1-year-old private limited company registered in Mildenhall, company number 16721973, one of 23 plumbing and heating companies in Mildenhall. Its next accounts are due at Companies House on 16 June 2027, and its first CT600 is due at HMRC on 15 September 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 Sentry Heat Ltd is registered
The registered office is in Mildenhall (IP28), in the West Suffolk local authority area, East of England. Show IP28 7DE on a map.
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Shared registered office
204 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Sentry Heat 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 16 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 17 Jun 2027 to 16 Jul 2027 | £150 |
| 1 to 3 months late | 17 Jul 2027 to 16 Sep 2027 | £375 |
| 3 to 6 months late | 17 Sep 2027 to 16 Dec 2027 | £750 |
| More than 6 months late | From 17 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16721973
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 September 2025 (1 year ago)
- Registered office
- Unit A, 82 James Carter Road, Mildenhall, IP28 7DE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 15 September 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 Mildenhall
Other active plumbing and heating companies registered in Mildenhall.
- UK Climate Control Ltd2026
- Avon Air Con Ltd2026
- Billo's Plumbing and Heating Ltd2025
- BMC Plumbing & Heating Ltd2026
- Cool & Easy (Northern) Ltd2026
- Critical Liquid Cooling Ltd2025
- East Anglia Air Conditioning Ltd2026
- Ecoteo Limited2021
All plumbing and heating companies in Mildenhall · All trades in Mildenhall · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sentry Heat Ltd's accounts due?
Sentry Heat Ltd's next accounts are due at Companies House by 16 June 2027 (in 246 days), covering the period to 30 September 2026.
When is Sentry Heat 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 15 September 2026, due by 15 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sentry Heat Ltd still trading?
Sentry Heat 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 Sentry Heat Ltd do?
Sentry Heat Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sentry Heat Ltd?
Sentry Heat Ltd was incorporated on 16 September 2025, 1 year ago.
What is the penalty if Sentry Heat 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 Sentry Heat 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.