- Company number
- 13918067
- Incorporated
- 15 Feb 20224 years trading
- Registered office
- 68 Blackiston Close, Coxhoe, Durham, DH6 4SX
- Nature of business
- Construction of domestic buildings; Construction of roads and motorways
Substruct Civils Ltd is a 4-year-old private limited company registered in Durham, company number 13918067, one of 120 building contractors in Durham. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 2028.
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 £21K (-95.1%) on the year before, to £1,100.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £1,738 against £638 owed within a year: 2.7 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £1,100 | £1,738 | £638 | 1 | |
| 28 Feb 2025 | £23K | £1,066 | 1 | ||
| 29 Feb 2024 | £24K | £2,540 | 2 | ||
| 28 Feb 2023 | £14K | £564 | 2 |
Where Substruct Civils Ltd is registered
The registered office is in Durham (DH6), in the County Durham local authority area, North East. Show DH6 4SX on a map.
Other trade companies in DH6
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- Ideal Fencing Solutions LimitedInstallers
- J. Philippe Group LtdBuilders
- PH Roads LtdBuilders
- Mpmgroundworks LtdBuilders
- K&C Construction and Development LtdBuilders
- JJ Restorations LimitedMechanics and garages
What happens if Substruct Civils 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 30 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 13918067
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 February 2022 (4 years ago)
- Registered office
- 68 Blackiston Close, Coxhoe, Durham, DH6 4SX
- Nature of business
- Construction of domestic buildings (SIC 41202)
Construction of roads and motorways (SIC 42110) - Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 14 February 2026
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 Durham
Other active building contractors registered in Durham.
- SWB Construction Ne Limited2019
- T Bryan Groundworks Ltd2023
- T&F Drywall Specialists Ltd2020
- T&S Brickwork Ltd2021
- The Wright Fix Property Maintenance Ltd2025
- VW & Sons Construction Limited2023
- W & D Christie Developments Limited2017
- Weatherston & Sons Ltd2022
All building contractors in Durham · All trades in Durham · Builders across the UK
Frequently asked questions
When are Substruct Civils Ltd's accounts due?
Substruct Civils Ltd's next accounts are due at Companies House by 30 November 2027 (in 414 days), covering the period to 28 February 2027.
When is Substruct Civils Ltd's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Substruct Civils Ltd still trading?
Substruct Civils 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 Substruct Civils Ltd do?
Substruct Civils Ltd is registered under Construction of domestic buildings (SIC 41202); Construction of roads and motorways (SIC 42110).
How old is Substruct Civils Ltd?
Substruct Civils Ltd was incorporated on 15 February 2022, 4 years ago.
What is the penalty if Substruct Civils 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 Substruct Civils 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.