- Companies
- Civil engineering
- Gloucester
- Mainline Civils Limited
Mainline Civils Limited
- Company number
- 13478363
- Incorporated
- 25 Jun 20215 years trading
- Registered office
- Goodridge Court, Goodridge Avenue, Gloucester, Gloucestershire, GL2 5EN
- Nature of business
- Construction of other civil engineering projects n.e.c.
Mainline Civils Limited is a 5-year-old private limited company registered in Gloucester, company number 13478363, one of 44 civil engineering contractors in Gloucester. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
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 down £55K (-37.2%) on the year before, to £93K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £69K against £56K owed within a year: 1.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £93K | £0 | £69K | £56K | 1 |
| 30 Jun 2024 | £149K | £194K | £142K | 1 | |
| 30 Jun 2023 | £128K | £125K | £114K | 2 | |
| 30 Jun 2022 | £91K | £68K | £81K | 1 |
Where Mainline Civils Limited is registered
The registered office is in Gloucester (GL2), in the Gloucester local authority area, South West. Show GL2 5EN on a map.
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Shared registered office
43 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Mainline Civils 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 13478363
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 June 2021 (5 years ago)
- Registered office
- Goodridge Court, Goodridge Avenue, Gloucester, Gloucestershire, GL2 5EN
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 24 June 2026
- Previous names
- Mainline Contracting Limited (until 2 Aug 2021)
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 Gloucester
Other active civil engineering contractors registered in Gloucester.
- P.D. Roberts Contractors Limited2003
- SDG Groundwork Solutions Ltd2014
- South West Civils Limited2014
- South West Utilities Ltd2021
- Specialist Rail Developments Ltd2022
- Storey Civil and Marine Limited2002
- Stormwater Solutions Ltd2022
- T Hawkins Screeding Ltd2023
All civil engineering contractors in Gloucester · All trades in Gloucester · Civil engineering across the UK
Frequently asked questions
When are Mainline Civils Limited's accounts due?
Mainline Civils Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Mainline Civils Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Mainline Civils Limited still trading?
Mainline Civils 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 Mainline Civils Limited do?
Mainline Civils Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Mainline Civils Limited?
Mainline Civils Limited was incorporated on 25 June 2021, 5 years ago.
What is the penalty if Mainline Civils 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 Mainline Civils 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.