- Companies
- Specialist contractors
- Bristol
- Calm Thermal Limited
Calm Thermal Limited
- Company number
- 16380787
- Incorporated
- 10 Apr 20251 year trading
- Registered office
- 86 Quantock Close, Bristol, BS30 8UU
- Nature of business
- Other specialised construction activities n.e.c.
Calm Thermal Limited is a 1-year-old private limited company registered in Bristol, company number 16380787, one of 442 specialist construction companies in Bristol. Its next accounts are due at Companies House on 31 January 2028, and the CT600 for the period to 30 April 2027 is due at HMRC on 30 April 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 30 April 2026, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Calm Thermal Limited is registered
The registered office is in Bristol (BS30), in the South Gloucestershire local authority area, South West. Show BS30 8UU on a map.
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What happens if Calm Thermal Limited 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 31 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2028 to 29 Feb 2028 | £150 |
| 1 to 3 months late | 1 Mar 2028 to 30 Apr 2028 | £375 |
| 3 to 6 months late | 1 May 2028 to 31 Jul 2028 | £750 |
| More than 6 months late | From 1 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 16380787
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 April 2025 (1 year ago)
- Registered office
- 86 Quantock Close, Bristol, BS30 8UU
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2026
- Last confirmation statement
- 9 April 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Bristol
Other active specialist construction companies registered in Bristol.
- Carbon Neutral Consulting Ltd2024
- Carrek Limited2010
- CH 146 Ltd2025
- Cheko Group Construction Ltd2025
- Chew Valley Construction Limited1986
- Cka Electrical Engineering Limited2017
- Clarkes Construction (Bristol) Ltd2024
- Class A Paving (Bristol) Limited2016
All specialist construction companies in Bristol · All trades in Bristol · Specialist contractors across the UK
Frequently asked questions
When are Calm Thermal Limited's accounts due?
Calm Thermal Limited's next accounts are due at Companies House by 31 January 2028 (in 475 days), covering the period to 30 April 2027.
When is Calm Thermal Limited's CT600 due?
The CT600 for the period to 30 April 2027 is due at HMRC by 30 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2028.
Is Calm Thermal Limited still trading?
Calm Thermal Limited 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 Calm Thermal Limited do?
Calm Thermal Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Calm Thermal Limited?
Calm Thermal Limited was incorporated on 10 April 2025, 1 year ago.
What is the penalty if Calm Thermal Limited 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 Calm Thermal Limited 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.