- Company number
- 14738665
- Incorporated
- 17 Mar 20233 years trading
- Registered office
- Suite 595, 5 Spur Road, Isleworth, TW7 5BD
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Painting
Extent Construction Ltd is a 3-year-old private limited company registered in Isleworth, company number 14738665, one of 132 building contractors in Isleworth. 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 £11K (+903%) on the year before, to £12K.
- Current assets of £9,213 against £22K owed within a year: 0.4 times cover.
- 7 employees on average, up from 3 the year before.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £12K | £9,213 | £22K | 7 | |
| 31 Mar 2024 | £1,228 | £4,073 | £2,845 | 3 |
Where Extent Construction Ltd is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 5BD on a map.
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What happens if Extent Construction 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
- 14738665
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 March 2023 (3 years ago)
- Registered office
- Suite 595, 5 Spur Road, Isleworth, TW7 5BD
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Painting (SIC 43341) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 16 March 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Isleworth
Other active building contractors registered in Isleworth.
- Family and Friends (Investments) Ltd2025
- First Floor Construction Ltd2022
- Fringe Buildings Construction Private Ltd2023
- GDL Contracts Ltd2025
- Gem Construction Services (UK) Ltd2010
- Gio Construction Limited2026
- Gurjant Singh Khaira Ltd2025
- Hi-Tech Investments Limited1999
All building contractors in Isleworth · All trades in Isleworth · Builders across the UK
Frequently asked questions
When are Extent Construction Ltd's accounts due?
Extent Construction Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Extent Construction 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 Extent Construction Ltd still trading?
Extent Construction 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 Extent Construction Ltd do?
Extent Construction Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Painting (SIC 43341).
How old is Extent Construction Ltd?
Extent Construction Ltd was incorporated on 17 March 2023, 3 years ago.
What is the penalty if Extent Construction 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 Extent Construction 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.