- Companies
- Builders
- Carshalton
- M & B Building Contractors Ltd
M & B Building Contractors Ltd
- Company number
- 15952743
- Incorporated
- 12 Sep 20242 years trading
- Registered office
- 65A Pound Street, Carshalton, SM5 3PG
- Nature of business
- Construction of domestic buildings
M & B Building Contractors Ltd is a 2-year-old private limited company registered in Carshalton, company number 15952743, one of 104 building contractors in Carshalton. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £2,945 on the year before, to £2,948.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £2,948 | £3,229 | £23K | 0 | |
| 31 Mar 2025 | £3 | £1,607 | £9,287 | 0 |
Where M & B Building Contractors Ltd is registered
The registered office is in Carshalton (SM5), in the Sutton local authority area, London. Show SM5 3PG on a map.
Other trade companies in SM5
- Rich Detailz LtdMechanics and garages
- Sutton Motor and Garage LtdMechanics and garages
- Ecobuild Plumbing & Heating LtdPlumbers and heating engineers
- Aaircon Services LtdPlumbers and heating engineers
- Perthy Properties (Greenhills) LimitedProperty developers
- Jophp LimitedCleaning companies
- Pro-Type Roofing LtdRoofers
- Mic Cleaning LimitedCleaning companies
What happens if M & B Building Contractors 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 15952743
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 September 2024 (2 years ago)
- Registered office
- 65A Pound Street, Carshalton, SM5 3PG
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 11 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 Carshalton
Other active building contractors registered in Carshalton.
- M&B Builders Ltd2025
- Mag Ukr Construction Ltd2020
- Mav Management Ltd2022
- Maxus Construction Ltd2025
- Micona Construction Ltd2026
- MJ Deca Ltd2023
- MK Builders Decorators Limited2018
- MK Building & Recycling Ltd2020
All building contractors in Carshalton · All trades in Carshalton · Builders across the UK
Frequently asked questions
When are M & B Building Contractors Ltd's accounts due?
M & B Building Contractors Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is M & B Building Contractors Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is M & B Building Contractors Ltd still trading?
M & B Building Contractors 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 Building Contractors Ltd do?
M & B Building Contractors Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is M & B Building Contractors Ltd?
M & B Building Contractors Ltd was incorporated on 12 September 2024, 2 years ago.
What is the penalty if M & B Building Contractors 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 Building Contractors 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.