- Companies
- Civil engineering
- Coventry
- Mains Infrastructure Construction Limited
Mains Infrastructure Construction Limited
- Company number
- 16805805
- Incorporated
- 23 Oct 2025
- Registered office
- Severn Trent Centre, 2 ST John's Street, Coventry, CV1 2LZ
- Nature of business
- Construction of utility projects for fluids; Construction of water projects
Mains Infrastructure Construction Limited is a newly incorporated private limited company registered in Coventry, company number 16805805, one of 112 civil engineering contractors in Coventry. Its next accounts are due at Companies House on 23 July 2027, and its first CT600 is due at HMRC on 22 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 Mains Infrastructure Construction Limited is registered
The registered office is in Coventry (CV1), in the Coventry local authority area, West Midlands. Show CV1 2LZ on a map.
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Also registered at this address
2 other companies use the same registered office as Mains Infrastructure Construction Limited.
- Synergen Utilities LimitedCivil engineering
- Watertight Management LimitedCivil engineering
What happens if Mains Infrastructure Construction 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 23 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Jul 2027 to 23 Aug 2027 | £150 |
| 1 to 3 months late | 24 Aug 2027 to 23 Oct 2027 | £375 |
| 3 to 6 months late | 24 Oct 2027 to 23 Jan 2028 | £750 |
| More than 6 months late | From 24 Jan 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
- 16805805
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 October 2025
- Registered office
- Severn Trent Centre, 2 ST John's Street, Coventry, CV1 2LZ
- Nature of business
- Construction of utility projects for fluids (SIC 42210)
Construction of water projects (SIC 42910) - Year end
- 31 March (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 Coventry
Other active civil engineering contractors registered in Coventry.
- Marrens Elite Surfacing Limited2025
- Modha Energy Ltd2024
- MPH Civils Limited2026
- Nate Engineering Ltd2026
- NH Construction Limited2003
- NS Utility Consultants Ltd2023
- Optimhouse Limited2017
- P.A.C Construction Ltd2019
All civil engineering contractors in Coventry · All trades in Coventry · Civil engineering across the UK
Frequently asked questions
When are Mains Infrastructure Construction Limited's accounts due?
Mains Infrastructure Construction Limited's next accounts are due at Companies House by 23 July 2027 (in 283 days), covering the period to 31 March 2027.
When is Mains Infrastructure Construction 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 22 October 2026, due by 22 October 2027, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mains Infrastructure Construction Limited still trading?
Mains Infrastructure Construction 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 Mains Infrastructure Construction Limited do?
Mains Infrastructure Construction Limited is registered under Construction of utility projects for fluids (SIC 42210); Construction of water projects (SIC 42910).
How old is Mains Infrastructure Construction Limited?
Mains Infrastructure Construction Limited was incorporated on 23 October 2025, less than a year ago.
What is the penalty if Mains Infrastructure Construction 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 Mains Infrastructure Construction 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.