- Company number
- 17418217
- Incorporated
- 25 Aug 2026
- Registered office
- 27 Aylesbury Close, London, E7 9AU
- Nature of business
- Construction of domestic buildings; Plastering; Roofing activities
Harrow Builders Ltd is a newly incorporated private limited company registered in London, company number 17418217, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 25 May 2028, and its first CT600 is due at HMRC on 24 August 2028.
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 Harrow Builders Ltd is registered
The registered office is in London (E7), in the Newham local authority area, London. Show E7 9AU on a map.
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What happens if Harrow 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 25 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 May 2028 to 25 Jun 2028 | £150 |
| 1 to 3 months late | 26 Jun 2028 to 25 Aug 2028 | £375 |
| 3 to 6 months late | 26 Aug 2028 to 25 Nov 2028 | £750 |
| More than 6 months late | From 26 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17418217
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 August 2026
- Registered office
- 27 Aylesbury Close, London, E7 9AU
- Nature of business
- Construction of domestic buildings (SIC 41202)
Plastering (SIC 43310)
Roofing activities (SIC 43910) - Year end
- 31 August (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 London
Other active building contractors registered in London.
- Harrow Home Builders Ltd2009
- Harry&Har Ltd2020
- Hartland Renos Ltd2026
- Harvest Star Group Ltd2025
- Harvinder Singh Limited2020
- Harwinder Jassal Ltd2016
- Harwood Homes Building Contractors Limited2026
- Hasan Builder Ltd2021
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Harrow Builders Ltd's accounts due?
Harrow Builders Ltd's next accounts are due at Companies House by 25 May 2028 (in 591 days), covering the period to 31 August 2027.
When is Harrow 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 24 August 2027, due by 24 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Harrow Builders Ltd still trading?
Harrow 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 Harrow Builders Ltd do?
Harrow Builders Ltd is registered under Construction of domestic buildings (SIC 41202); Plastering (SIC 43310); Roofing activities (SIC 43910).
How old is Harrow Builders Ltd?
Harrow Builders Ltd was incorporated on 25 August 2026, less than a year ago.
What is the penalty if Harrow 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 Harrow 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.