- Companies
- Civil engineering
- Leeds
- 345 Civil Engineering Ltd
345 Civil Engineering Ltd
- Company number
- 17044234
- Incorporated
- 19 Feb 2026
- Registered office
- 1 Park Avenue, Swillington, Leeds, LS26 8UQ
- Nature of business
- Construction of roads and motorways; Construction of bridges and tunnels; Construction of other civil engineering projects n.e.c.; Site preparation
345 Civil Engineering Ltd is a newly incorporated private limited company registered in Leeds, company number 17044234, one of 163 civil engineering contractors in Leeds. Its next accounts are due at Companies House on 19 November 2027, and its first CT600 is due at HMRC on 18 February 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 345 Civil Engineering Ltd is registered
The registered office is in Leeds (LS26), in the Leeds local authority area, Yorkshire and The Humber. Show LS26 8UQ on a map.
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What happens if 345 Civil Engineering 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 19 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 20 Nov 2027 to 19 Dec 2027 | £150 |
| 1 to 3 months late | 20 Dec 2027 to 19 Feb 2028 | £375 |
| 3 to 6 months late | 20 Feb 2028 to 19 May 2028 | £750 |
| More than 6 months late | From 20 May 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
- 17044234
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 February 2026
- Registered office
- 1 Park Avenue, Swillington, Leeds, LS26 8UQ
- Nature of business
- Construction of roads and motorways (SIC 42110)
Construction of bridges and tunnels (SIC 42130)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Site preparation (SIC 43120) - Year end
- 28 February (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 Leeds
Other active civil engineering contractors registered in Leeds.
- A J Harriman Construction Ltd2026
- A R Site Services Limited2015
- Abje Limited2024
- Ac Commercial Solutions Ltd2022
- Acute Heating Ltd2022
- Ad Grip Limited2024
- Aj Utilities Ltd2025
- Alhamdani Consultants Limited1994
All civil engineering contractors in Leeds · All trades in Leeds · Civil engineering across the UK
Frequently asked questions
When are 345 Civil Engineering Ltd's accounts due?
345 Civil Engineering Ltd's next accounts are due at Companies House by 19 November 2027 (in 402 days), covering the period to 28 February 2027.
When is 345 Civil Engineering Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 18 February 2027, due by 18 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is 345 Civil Engineering Ltd still trading?
345 Civil Engineering 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 345 Civil Engineering Ltd do?
345 Civil Engineering Ltd is registered under Construction of roads and motorways (SIC 42110); Construction of bridges and tunnels (SIC 42130); Construction of other civil engineering projects n.e.c. (SIC 42990); Site preparation (SIC 43120).
How old is 345 Civil Engineering Ltd?
345 Civil Engineering Ltd was incorporated on 19 February 2026, less than a year ago.
What is the penalty if 345 Civil Engineering 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 345 Civil Engineering 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.