- Companies
- Civil engineering
- Harrow
- Brennan Civils and Infrastructure Limited
Brennan Civils and Infrastructure Limited
- Company number
- 17385829
- Incorporated
- 6 Aug 2026
- Registered office
- Congress House, 14 Lyon Road, Harrow, HA1 2EN
- Nature of business
- Construction of other civil engineering projects n.e.c.
Brennan Civils and Infrastructure Limited is a newly incorporated private limited company registered in Harrow, company number 17385829, one of 121 civil engineering contractors in Harrow. Its next accounts are due at Companies House on 6 May 2028, and its first CT600 is due at HMRC on 5 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 Brennan Civils and Infrastructure Limited is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 2EN on a map.
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- Ac Operations LtdScaffolders
- Verde Masters LtdLandscapers and gardeners
- Omega Works Group LtdLandscapers and gardeners
- Call 'Em LimitedPlumbers and heating engineers
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Also registered at this address
9 other companies use the same registered office as Brennan Civils and Infrastructure Limited.
- 4 Mark Construction LimitedFinishing trades
- Amwell Driveways LtdLandscapers and gardeners
- Atlas Care Homes Group LtdProperty developers
- DMP Healthcare (Holdings) 3 LtdBuilders
- Jamie Rail LtdCivil engineering
- M X Construction LimitedCivil engineering
- Old Beams Development and Sales LimitedProperty developers
- Rosslyn Investments LimitedProperty developers
- TM Tree and Landscaping LtdLandscapers and gardeners
What happens if Brennan Civils and Infrastructure 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 6 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 7 May 2028 to 6 Jun 2028 | £150 |
| 1 to 3 months late | 7 Jun 2028 to 6 Aug 2028 | £375 |
| 3 to 6 months late | 7 Aug 2028 to 6 Nov 2028 | £750 |
| More than 6 months late | From 7 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
- 17385829
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 August 2026
- Registered office
- Congress House, 14 Lyon Road, Harrow, HA1 2EN
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Harrow
Other active civil engineering contractors registered in Harrow.
- BS Power Solutions Ltd2026
- Carol Ltd2023
- Ceo Construction Ltd2022
- CH2 Solutions Ltd2015
- Chris Cleal Rail Limited2011
- City D&B Ltd2014
- City Tiler Group Ltd2019
- Ciulo Limited2024
All civil engineering contractors in Harrow · All trades in Harrow · Civil engineering across the UK
Frequently asked questions
When are Brennan Civils and Infrastructure Limited's accounts due?
Brennan Civils and Infrastructure Limited's next accounts are due at Companies House by 6 May 2028 (in 571 days), covering the period to 31 August 2027.
When is Brennan Civils and Infrastructure 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 5 August 2027, due by 5 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 Brennan Civils and Infrastructure Limited still trading?
Brennan Civils and Infrastructure 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 Brennan Civils and Infrastructure Limited do?
Brennan Civils and Infrastructure Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Brennan Civils and Infrastructure Limited?
Brennan Civils and Infrastructure Limited was incorporated on 6 August 2026, less than a year ago.
What is the penalty if Brennan Civils and Infrastructure 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 Brennan Civils and Infrastructure 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.