- Companies
- Plumbers and heating engineers
- Durham
- Thermal North Group Ltd
Thermal North Group Ltd
- Company number
- 12629544
- Incorporated
- 28 May 20206 years trading
- Registered office
- The Meadows, Sunderland Bridge, Durham, DH6 5HD
- Nature of business
- Plumbing, heat and air-conditioning installation
Thermal North Group Ltd is a 6-year-old private limited company registered in Durham, company number 12629544, one of 44 plumbing and heating companies in Durham. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £11K (-84.8%) on the year before, to £1,963.
- Net assets rose in 1 of 4 year-on-year comparisons on record.
- Current assets of £23K against £22K owed within a year: 1.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £1,963 | £7,049 | £23K | £22K | 0 |
| 31 May 2024 | £13K | £7,082 | £25K | £12K | 2 |
| 31 May 2023 | £8,417 | £1,925 | £14K | £6,176 | 2 |
| 31 May 2022 | £17K | £28K | £5,016 | 1 | |
| 31 May 2021 | £24K | £28K | £5,197 | 1 |
Where Thermal North Group Ltd is registered
The registered office is in Durham (DH6), in the County Durham local authority area, North East. Show DH6 5HD on a map.
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What happens if Thermal North Group 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 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
- 12629544
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 May 2020 (6 years ago)
- Registered office
- The Meadows, Sunderland Bridge, Durham, DH6 5HD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 27 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 Durham
Other active plumbing and heating companies registered in Durham.
- Thermo Systems Ltd2023
- Abbotts Heating and Plumbing Ltd2023
- As Gas Services Ltd2017
- Asd Property Projects Ltd2025
- BS Heating Solutions (Ne) Limited2021
- C and C Campbell Limited2022
- CBR Refrigeration & Air Conditioning Ltd2023
- David Parsons Limited2000
All plumbing and heating companies in Durham · All trades in Durham · Plumbers and heating engineers across the UK
Frequently asked questions
When are Thermal North Group Ltd's accounts due?
Thermal North Group Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Thermal North Group Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Thermal North Group Ltd still trading?
Thermal North Group 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 Thermal North Group Ltd do?
Thermal North Group Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Thermal North Group Ltd?
Thermal North Group Ltd was incorporated on 28 May 2020, 6 years ago.
What is the penalty if Thermal North Group 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 Thermal North Group 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.