- Companies
- Installers
- Slough
- Thames Valley Insulation Limited
Thames Valley Insulation Limited
- Company number
- 10358805
- Incorporated
- 5 Sep 201610 years trading
- Registered office
- Unit 8, Elderway Waterside Drive, Langley, Slough, SL3 6EP
- Nature of business
- Other construction installation
Thames Valley Insulation Limited is a 10-year-old private limited company registered in Slough, company number 10358805, one of 73 installation companies (insulation, lifts, shutters and similar) in Slough. Its next accounts are due at Companies House on 27 August 2027, and the CT600 for the period to 27 November 2026 is due at HMRC on 27 November 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 £3,468 (+0.6%) on the year before, to £592K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £2.2M against £2M owed within a year: 1.1 times cover.
- 23 employees on average, up from 18 the year before.
- Balance sheets on record for 8 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £592K | £1.6M | £2.2M | £2M | 23 |
| 30 Nov 2024 | £589K | £2.7M | £3.3M | £2.9M | 18 |
| 30 Nov 2023 | £640K | £974K | £3.8M | £3.4M | 11 |
| 30 Nov 2022 | £387K | £175K | £718K | £426K | 8 |
| 30 Nov 2021 | £325K | £588K | £1.2M | £907K | 6 |
| 30 Sep 2019 | £39K | £99K | £99K | £9,430 | |
| 30 Sep 2018 | £143K | £184K | £41K | ||
| 30 Sep 2017 | £109 | £66K | £66K |
Where Thames Valley Insulation Limited is registered
The registered office is in Slough (SL3), in the Slough local authority area, South East. Show SL3 6EP on a map.
Other trade companies in SL3
- Tac Design & Build LtdFinishing trades
- G&S Formwork LtdBuilders
- Klenzo LtdCleaning companies
- West London Crown Construction LtdBuilders
- Dahlia Investment Group LimitedProperty developers
- Ekon Electrics LtdElectricians
- R&G Maintenance LtdCleaning companies
- Cornerstone Homes & Estates LtdProperty developers
Also registered at this address
1 other company uses the same registered office as Thames Valley Insulation Limited.
- Berks Agro LtdMachinery repair and installation
What happens if Thames Valley Insulation 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 27 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Aug 2027 to 27 Sep 2027 | £150 |
| 1 to 3 months late | 28 Sep 2027 to 27 Nov 2027 | £375 |
| 3 to 6 months late | 28 Nov 2027 to 27 Feb 2028 | £750 |
| More than 6 months late | From 28 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Nov 2027 | £200 |
| 3 months late | 27 Feb 2028 | another £200 |
| 6 months late | 27 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Nov 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
- 10358805
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 September 2016 (10 years ago)
- Registered office
- Unit 8, Elderway Waterside Drive, Langley, Slough, SL3 6EP
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 27 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 17 May 2026
- Previous names
- Thames Valley Insuilation Limited (until 19 Oct 2016)
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 Slough
Other active installation companies (insulation, lifts, shutters and similar) registered in Slough.
- Thermador Installation Limited2026
- Thermamax Ltd2025
- Vexia Limited2026
- Vibra Energy Ltd2023
- VPM Ceilings and Dry Lining Ltd2026
- Weathershield Double Glazing Ltd2024
- Willment & Co Ltd2013
- Wood & Nail Ltd2025
All installation companies (insulation, lifts, shutters and similar) in Slough · All trades in Slough · Installers across the UK
Frequently asked questions
When are Thames Valley Insulation Limited's accounts due?
Thames Valley Insulation Limited's next accounts are due at Companies House by 27 August 2027 (in 318 days), covering the period to 27 November 2026.
When is Thames Valley Insulation Limited's CT600 due?
The CT600 for the period to 27 November 2026 is due at HMRC by 27 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 28 August 2027.
Is Thames Valley Insulation Limited still trading?
Thames Valley Insulation 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 Thames Valley Insulation Limited do?
Thames Valley Insulation Limited is registered under Other construction installation (SIC 43290).
How old is Thames Valley Insulation Limited?
Thames Valley Insulation Limited was incorporated on 5 September 2016, 10 years ago.
What is the penalty if Thames Valley Insulation 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 Thames Valley Insulation 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.