- Companies
- Civil engineering
- Colchester
- Seismic Construction Ltd
Seismic Construction Ltd
- Company number
- 17158082
- Incorporated
- 14 Apr 2026
- Registered office
- 14 Laburnum Grove, Colchester, CO4 3NB
- Nature of business
- Construction of roads and motorways; Construction of bridges and tunnels
Seismic Construction Ltd is a newly incorporated private limited company registered in Colchester, company number 17158082, one of 103 civil engineering contractors in Colchester. Its next accounts are due at Companies House on 14 January 2028, and its first CT600 is due at HMRC on 13 April 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.
Is this your company?
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Where Seismic Construction Ltd is registered
The registered office is in Colchester (CO4), in the Colchester local authority area, East of England. Show CO4 3NB on a map.
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What happens if Seismic Construction 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 14 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 15 Jan 2028 to 14 Feb 2028 | £150 |
| 1 to 3 months late | 15 Feb 2028 to 14 Apr 2028 | £375 |
| 3 to 6 months late | 15 Apr 2028 to 14 Jul 2028 | £750 |
| More than 6 months late | From 15 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 17158082
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 April 2026
- Registered office
- 14 Laburnum Grove, Colchester, CO4 3NB
- Nature of business
- Construction of roads and motorways (SIC 42110)
Construction of bridges and tunnels (SIC 42130) - Year end
- 30 April (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 Colchester
Other active civil engineering contractors registered in Colchester.
- SLB Roads Ltd2019
- SP Pipeline & Sewers Ltd2022
- Star Design Solutions Ltd2014
- Stephen Minshull Ltd2024
- Stoken Properties Limited2001
- Stonebridge Services Limited2021
- Stonemark Construction Ltd2026
- Taylors Civil Engineering Ltd2014
All civil engineering contractors in Colchester · All trades in Colchester · Civil engineering across the UK
Frequently asked questions
When are Seismic Construction Ltd's accounts due?
Seismic Construction Ltd's next accounts are due at Companies House by 14 January 2028 (in 458 days), covering the period to 30 April 2027.
When is Seismic Construction 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 13 April 2027, due by 13 April 2028, and one for the period to 30 April 2027, due by 30 April 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Seismic Construction Ltd still trading?
Seismic Construction 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 Seismic Construction Ltd do?
Seismic Construction Ltd is registered under Construction of roads and motorways (SIC 42110); Construction of bridges and tunnels (SIC 42130).
How old is Seismic Construction Ltd?
Seismic Construction Ltd was incorporated on 14 April 2026, less than a year ago.
What is the penalty if Seismic Construction 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 Seismic Construction 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.