- Company number
- 16731983
- Incorporated
- 22 Sep 20251 year trading
- Registered office
- 26 Manor Court, Slough, SL1 5NE
- Nature of business
- Construction of domestic buildings; Other construction installation
M4 Builders Limited is a 1-year-old private limited company registered in Slough, company number 16731983, one of 683 building contractors in Slough. Its next accounts are due at Companies House on 22 June 2027, and its first CT600 is due at HMRC on 21 September 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where M4 Builders Limited is registered
The registered office is in Slough (SL1), in the Slough local authority area, South East. Show SL1 5NE on a map.
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What happens if M4 Builders 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 22 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Jun 2027 to 22 Jul 2027 | £150 |
| 1 to 3 months late | 23 Jul 2027 to 22 Sep 2027 | £375 |
| 3 to 6 months late | 23 Sep 2027 to 22 Dec 2027 | £750 |
| More than 6 months late | From 23 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16731983
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 September 2025 (1 year ago)
- Registered office
- 26 Manor Court, Slough, SL1 5NE
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other construction installation (SIC 43290) - Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 21 September 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 Slough
Other active building contractors registered in Slough.
- Ma Living Solutions Ltd2026
- Magic Landscaping Ltd2025
- Mahal Property Maintence Ltd2026
- Major Design and Build Limited2025
- Malwa Construction Limited2023
- Manes Driveways & Construction Ltd2022
- Manthan Puri Ltd2021
- Markayl Construction Ltd2023
All building contractors in Slough · All trades in Slough · Builders across the UK
Frequently asked questions
When are M4 Builders Limited's accounts due?
M4 Builders Limited's next accounts are due at Companies House by 22 June 2027 (in 253 days), covering the period to 30 September 2026.
When is M4 Builders Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 21 September 2026, due by 21 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is M4 Builders Limited still trading?
M4 Builders Limited is listed as active on the Companies House register (checked 12 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 M4 Builders Limited do?
M4 Builders Limited is registered under Construction of domestic buildings (SIC 41202); Other construction installation (SIC 43290).
How old is M4 Builders Limited?
M4 Builders Limited was incorporated on 22 September 2025, 1 year ago.
What is the penalty if M4 Builders 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 M4 Builders Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.