- Company number
- 16790183
- Incorporated
- 16 Oct 2025
- Registered office
- 19 Cadogan Close, Harrow, HA2 8JR
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
MB Builder Limited is a newly incorporated private limited company registered in Harrow, company number 16790183, one of 793 building contractors in Harrow. Its next accounts are due at Companies House on 16 July 2027, and its first CT600 is due at HMRC on 15 October 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 MB Builder Limited is registered
The registered office is in Harrow (HA2), in the Harrow local authority area, London. Show HA2 8JR on a map.
Other trade companies in HA2
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- JNJ Engineering LimitedCivil engineering
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- Grandwellautos LtdMotor traders
- Multisteel Powdercoating LtdPainters and decorators
- Neon Systems LtdElectricians
- Firstclass Facilities LtdCleaning companies
- PMD Construct LtdBuilders
What happens if MB Builder 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 16 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 17 Jul 2027 to 16 Aug 2027 | £150 |
| 1 to 3 months late | 17 Aug 2027 to 16 Oct 2027 | £375 |
| 3 to 6 months late | 17 Oct 2027 to 16 Jan 2028 | £750 |
| More than 6 months late | From 17 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 16790183
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 October 2025
- Registered office
- 19 Cadogan Close, Harrow, HA2 8JR
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
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 Harrow
Other active building contractors registered in Harrow.
- MB Formwork Ltd2025
- MBB Construction Ltd2020
- MBM Star Construction Ltd2022
- MBT Builders Ltd2018
- Mbud Ltd.2015
- McEleney Plastering Limited2016
- MCL Interior Solutions Ltd2021
- MCMS Construction Ltd2025
All building contractors in Harrow · All trades in Harrow · Builders across the UK
Frequently asked questions
When are MB Builder Limited's accounts due?
MB Builder Limited's next accounts are due at Companies House by 16 July 2027 (in 277 days), covering the period to 31 October 2026.
When is MB Builder 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 15 October 2026, due by 15 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is MB Builder Limited still trading?
MB Builder 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 MB Builder Limited do?
MB Builder Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is MB Builder Limited?
MB Builder Limited was incorporated on 16 October 2025, less than a year ago.
What is the penalty if MB Builder 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 MB Builder 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.