- Companies
- Civil engineering
- Liverpool
- SD 1 Civils Ltd
SD 1 Civils Ltd
- Company number
- 16102646
- Incorporated
- 26 Nov 20241 year trading
- Registered office
- 166 Linacre Road, Liverpool, L21 8JU
- Nature of business
- Construction of other civil engineering projects n.e.c.
SD 1 Civils Ltd is a 1-year-old private limited company registered in Liverpool, company number 16102646, one of 284 civil engineering contractors in Liverpool. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where SD 1 Civils Ltd is registered
The registered office is in Liverpool (L21), in the Sefton local authority area, North West. Show L21 8JU on a map.
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- LHJM Scaffolding LtdSpecialist contractors
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- The Garden Lad LtdLandscapers and gardeners
- Citrine Cleaning Services LtdCleaning companies
Shared registered office
58 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 SD 1 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 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
- 16102646
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 November 2024 (1 year ago)
- Registered office
- 166 Linacre Road, Liverpool, L21 8JU
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 25 November 2025
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 Liverpool
Other active civil engineering contractors registered in Liverpool.
- Senate Mech Limited2002
- Shape Consulting Engineers Limited2016
- SJT Building Services (NW) Ltd2008
- Skye Construction Limited2026
- Skyline Property Solutions Limited2005
- SLG Driveways Ltd2022
- Smartpave Ltd2025
- Smartpave Solutions Limited2025
All civil engineering contractors in Liverpool · All trades in Liverpool · Civil engineering across the UK
Frequently asked questions
When are SD 1 Civils Ltd's accounts due?
SD 1 Civils Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is SD 1 Civils Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is SD 1 Civils Ltd still trading?
SD 1 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 SD 1 Civils Ltd do?
SD 1 Civils Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is SD 1 Civils Ltd?
SD 1 Civils Ltd was incorporated on 26 November 2024, 1 year ago.
What is the penalty if SD 1 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 SD 1 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.