- Companies
- Civil engineering
- Wellington
- Quantum Structural Design Ltd
Quantum Structural Design Ltd
- Company number
- 16099623
- Incorporated
- 25 Nov 20241 year trading
- Registered office
- 8 Sanford Rise, Wellington, TA21 9GF
- Nature of business
- Construction of other civil engineering projects n.e.c.; specialised design activities
Quantum Structural Design Ltd is a 1-year-old private limited company registered in Wellington, company number 16099623, one of 11 civil engineering contractors in Wellington. Companies House shows its accounts as overdue: they were due on 25 August 2026.
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 Quantum Structural Design Ltd is registered
The registered office is in Wellington (TA21), in the Somerset local authority area, South West. Show TA21 9GF on a map.
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What happens if Quantum Structural Design Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 Aug 2026 to 25 Sep 2026 | £150 |
| 1 to 3 months late | 26 Sep 2026 to 25 Nov 2026 | £375 |
| 3 to 6 months late | 26 Nov 2026 to 25 Feb 2027 | £750 |
| More than 6 months late | From 26 Feb 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 16099623
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2024 (1 year ago)
- Registered office
- 8 Sanford Rise, Wellington, TA21 9GF
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
specialised design activities (SIC 74100) - Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 16 February 2026
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 Wellington
Other active civil engineering contractors registered in Wellington.
- Rock Homes (SW) Ltd2006
- Zomerset Services Limited2007
- Ashton Morton Ltd2025
- Bussell Group Ltd2026
- Chris Powell Carpentry Ltd2025
- Jacob's Civil Engineering Solutions Limited2018
- Level Construction (South West) Limited2022
- M Jones Utilities Limited2022
All civil engineering contractors in Wellington · All trades in Wellington · Civil engineering across the UK
Frequently asked questions
When are Quantum Structural Design Ltd's accounts due?
Quantum Structural Design Ltd's accounts were due at Companies House on 25 August 2026 and the register shows them as overdue.
When is Quantum Structural Design 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 24 November 2025, due by 24 November 2026, and one for the period to 30 November 2025, due by 30 November 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Quantum Structural Design Ltd still trading?
Quantum Structural Design Ltd is listed as active on the Companies House register (checked 13 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 Quantum Structural Design Ltd do?
Quantum Structural Design Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); specialised design activities (SIC 74100).
How old is Quantum Structural Design Ltd?
Quantum Structural Design Ltd was incorporated on 25 November 2024, 1 year ago.
What is the penalty if Quantum Structural Design 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 Quantum Structural Design Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.