- Companies
- Plumbers and heating engineers
- Northampton
- Cooltherm Air Conditioning Ltd
Cooltherm Air Conditioning Ltd
- Company number
- 14239105
- Incorporated
- 18 Jul 20224 years trading
- Registered office
- Derngate Mews, Derngate, Northampton, Northamptonshire, NN1 1UE
- Nature of business
- Plumbing, heat and air-conditioning installation
Cooltherm Air Conditioning Ltd is a 4-year-old private limited company registered in Northampton, company number 14239105, one of 197 plumbing and heating companies in Northampton. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 up £773 (+15.1%) on the year before, to £5,884.
- Current assets of £12K against £7,573 owed within a year: 1.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £5,884 | £12K | £7,573 | 0 | |
| 31 Mar 2024 | £5,111 | £11K | £7,434 | 0 | |
| 31 Mar 2023 | £14K | £18K | £5,792 | 0 |
Where Cooltherm Air Conditioning Ltd is registered
The registered office is in Northampton (NN1), in the West Northamptonshire local authority area, East Midlands. Show NN1 1UE on a map.
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- Remedy Property Services LtdSpecialist contractors
- Deezi LtdJoiners and carpenters
- Setup Phone LtdRepair services
- Macmarlloe LtdPlumbers and heating engineers
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Also registered at this address
23 other companies use the same registered office as Cooltherm Air Conditioning Ltd.
- Acm Property Care LtdFinishing trades
- Aqua Valve Plumbing LtdPlumbers and heating engineers
- Bargrave Developments LimitedProperty developers
- Billings Plumbing and Heating LtdPlumbers and heating engineers
- Carriage Properties LimitedProperty developers
- Cool Space Solutions LimitedPlumbers and heating engineers
- Crystal Windows Northampton LtdJoiners and carpenters
- Flexispace Construction LtdProperty developers
- G P Interiors LimitedFinishing trades
- H & H Electrical (Services) LimitedElectricians
- Heritage Electrical (Lincs) LimitedElectricians
- Heritage Property JB LtdProperty developers
- J B House LimitedRoofers
- JP Chapman Services LtdPlumbers and heating engineers
- P.T. Higgins Building & Construction LtdBuilders
- Plaster R LimitedPlasterers
- Pro Highway Solutions LtdCivil engineering
- Re4Orm Construction LimitedBuilders
- Reactive Plumber LtdPlumbers and heating engineers
- S Burton LimitedElectricians
- Shawry Services Ltd.Builders
- SPS Plastering Contractors LimitedProperty developers
- XRM Commercial LtdMotor traders
What happens if Cooltherm Air Conditioning 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 14239105
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 July 2022 (4 years ago)
- Registered office
- Derngate Mews, Derngate, Northampton, Northamptonshire, NN1 1UE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 12 January 2026
- Previous names
- Cool Therm Air Conditioning Ltd (until 20 Jul 2022)
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 Northampton
Other active plumbing and heating companies registered in Northampton.
- County Cooling & Electrical Ltd2026
- CSC Plumbing and Heating Ltd2019
- D & C Heating Services Limited2014
- D Blakemore Ltd2026
- D P Allison Plumbing and Construction Limited2015
- DB Plumbing and Heating Services Ltd2023
- DC Plumbing Limited2026
- DK Plumbing Services Ltd2014
All plumbing and heating companies in Northampton · All trades in Northampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are Cooltherm Air Conditioning Ltd's accounts due?
Cooltherm Air Conditioning Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Cooltherm Air Conditioning Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Cooltherm Air Conditioning Ltd still trading?
Cooltherm Air Conditioning 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 Cooltherm Air Conditioning Ltd do?
Cooltherm Air Conditioning Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Cooltherm Air Conditioning Ltd?
Cooltherm Air Conditioning Ltd was incorporated on 18 July 2022, 4 years ago.
What is the penalty if Cooltherm Air Conditioning 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 Cooltherm Air Conditioning 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.