- Companies
- Builders
- Carshalton
- M&B Builders Ltd
M&B Builders Ltd
- Company number
- 16266439
- Incorporated
- 20 Feb 20251 year trading
- Registered office
- 61 Thornton Road, Carshalton, SM5 1NL
- Nature of business
- Construction of domestic buildings
M&B Builders Ltd is a 1-year-old private limited company registered in Carshalton, company number 16266439, one of 104 building contractors in Carshalton. Its next accounts are due at Companies House on 20 November 2026, and its first CT600 is due at HMRC on 19 February 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 M&B Builders Ltd is registered
The registered office is in Carshalton (SM5), in the Sutton local authority area, London. Show SM5 1NL on a map.
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What happens if M&B Builders 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 20 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Nov 2026 to 20 Dec 2026 | £150 |
| 1 to 3 months late | 21 Dec 2026 to 20 Feb 2027 | £375 |
| 3 to 6 months late | 21 Feb 2027 to 20 May 2027 | £750 |
| More than 6 months late | From 21 May 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
- 16266439
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 February 2025 (1 year ago)
- Registered office
- 61 Thornton Road, Carshalton, SM5 1NL
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 10 February 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 Carshalton
Other active building contractors registered in Carshalton.
- Mag Ukr Construction Ltd2020
- Mav Management Ltd2022
- Maxus Construction Ltd2025
- Micona Construction Ltd2026
- MJ Deca Ltd2023
- MK Builders Decorators Limited2018
- MK Building & Recycling Ltd2020
- MKM General Building Ltd2016
All building contractors in Carshalton · All trades in Carshalton · Builders across the UK
Frequently asked questions
When are M&B Builders Ltd's accounts due?
M&B Builders Ltd's next accounts are due at Companies House by 20 November 2026 (in 38 days), covering the period to 31 March 2026.
When is M&B Builders Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 February 2026, due by 19 February 2027, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is M&B Builders Ltd still trading?
M&B Builders 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 M&B Builders Ltd do?
M&B Builders Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is M&B Builders Ltd?
M&B Builders Ltd was incorporated on 20 February 2025, 1 year ago.
What is the penalty if M&B Builders 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 M&B Builders 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.