- Companies
- Installers
- Wantage
- Thermal Contractors Limited
Thermal Contractors Limited
- Company number
- 04853706
- Incorporated
- 1 Aug 200323 years trading
- Registered office
- Office 135 Boston House, Grove Business Park, Downsview Road, Wantage, OX12 9FF
- Nature of business
- Other construction installation
Thermal Contractors Limited is a 23-year-old private limited company registered in Wantage, company number 04853706, one of the UK's installation companies (insulation, lifts, shutters and similar). Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £111K (-8.1%) on the year before, to £1.3M.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £1.4M against £116K owed within a year: more than 10 times cover.
- 8 employees on average, up from 7 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £1.3M | £1.1M | £1.4M | £116K | 8 |
| 31 Aug 2024 | £1.4M | £1.2M | £1.5M | £135K | 7 |
| 31 Aug 2023 | £1.4M | £1.2M | £1.6M | £227K | 7 |
| 31 Aug 2022 | £1.2M | £1.1M | £1.3M | £142K | 7 |
| 31 Aug 2021 | £1.3M | £1.1M | £1.5M | £187K | 7 |
| 31 Aug 2020 | £1.2M | £844K | £1.5M | £404K | 8 |
| 31 Aug 2019 | £758K | £544K | £977K | £278K | |
| 31 Aug 2018 | £569K | £387K | £750K | £223K | 7 |
| 31 Aug 2017 | £438K | £318K | £663K | £259K | |
| 31 Aug 2016 | £210K | £155K | £422K | £258K |
Public contracts won
Thermal Contractors Limited has one public sector contract award on record; the ones with their own published value total £68K (2026). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| UK Research & Innovation (UKRI) | UKRI-5649 MRC Harwell, Building 383 – Insulation Upgrades | £68K | 16 Jan 2026 |
Where Thermal Contractors Limited is registered
The registered office is in Wantage (OX12), in the Vale of White Horse local authority area, South East. Show OX12 9FF on a map.
Other trade companies in OX12
- Busby Heritage LtdProperty developers
- Alan Cleaning LtdCleaning companies
- Novus Tiling LimitedFloor and wall tilers
- Blu Subsea Diving Services UK LtdMachinery repair and installation
- Summit Scaffolding Services LtdScaffolders
- Posh Wash Didcot LtdCleaning companies
- HPLD LimitedLandscapers and gardeners
- 4Paws Grooming LtdCleaning companies
Also registered at this address
2 other companies use the same registered office as Thermal Contractors Limited.
- Alan Edward Gardeners LimitedLandscapers and gardeners
- G J Campbell Contractors LtdLandscapers and gardeners
What happens if Thermal Contractors 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 04853706
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 August 2003 (23 years ago)
- Registered office
- Office 135 Boston House, Grove Business Park, Downsview Road, Wantage, OX12 9FF
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 26 June 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Wantage
Other active installation companies (insulation, lifts, shutters and similar) registered in Wantage.
All installation companies (insulation, lifts, shutters and similar) in Wantage · All trades in Wantage · Installers across the UK
Frequently asked questions
When are Thermal Contractors Limited's accounts due?
Thermal Contractors Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Thermal Contractors Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Thermal Contractors Limited still trading?
Thermal Contractors 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 Thermal Contractors Limited do?
Thermal Contractors Limited is registered under Other construction installation (SIC 43290).
How old is Thermal Contractors Limited?
Thermal Contractors Limited was incorporated on 1 August 2003, 23 years ago.
Has Thermal Contractors Limited won public sector contracts?
Yes. Thermal Contractors Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £68K), most recently from UK Research & Innovation (UKRI).
What is the penalty if Thermal Contractors 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 Thermal Contractors 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.