- Companies
- Property developers
- Blackwood
- D & D Substructures Limited
D & D Substructures Limited
- Company number
- 15898840
- Incorporated
- 15 Aug 20242 years trading
- Registered office
- Unit G3B Britannia Centre for Enterprise, Pengam, Blackwood, NP12 3SP
- Nature of business
- Development of building projects; Construction of other civil engineering projects n.e.c.; Other construction installation
D & D Substructures Limited is a 2-year-old private limited company registered in Blackwood, company number 15898840, one of 22 property development companies in Blackwood. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 August 2025, as filed at Companies House.
Who runs and owns D & D Substructures Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| D*** B*** | Director | Aug 2024 |
| D*** S*** | Director | Aug 2024 |
| D*** B*** | Secretary | Aug 2024 |
People with significant control (2)
Where D & D Substructures Limited is registered
The registered office is in Blackwood (NP12), in the Caerphilly local authority area, Wales. Show NP12 3SP on a map.
Other trade companies in NP12
- Hohm Property Group LtdProperty developers
- R&C Mechanics LimitedMechanics and garages
- M & R Property Solutions (SW) LimitedFinishing trades
- JLH Scaffolding LtdScaffolders
- SM Contracting SW LtdBuilders
- Top Notch Carpentry Services LimitedInstallers
- Cardiff Bathrooms LtdFinishing trades
- CB Brickwork & Building LtdSpecialist contractors
What happens if D & D Substructures Limited 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2028 | 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
- 15898840
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 August 2024 (2 years ago)
- Registered office
- Unit G3B Britannia Centre for Enterprise, Pengam, Blackwood, NP12 3SP
- Nature of business
- Development of building projects (SIC 41100)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Other construction installation (SIC 43290) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 14 August 2026
- Previous names
- D & D Structures Limited (until 21 Aug 2024)
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Blackwood
Other active property development companies registered in Blackwood.
- Gear Group UK Limited2025
- Grankoak Developments Ltd2026
- Haulfryn Developments Ltd2016
- Hohm Property Group Ltd2026
- Howses Limited2002
- Insight Contracting Ltd2020
- JD Carpentry SW Ltd2025
- Kijon Developments Limited2004
All property development companies in Blackwood · All trades in Blackwood · Property developers across the UK
Frequently asked questions
When are D & D Substructures Limited's accounts due?
D & D Substructures Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is D & D Substructures Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is D & D Substructures Limited still trading?
D & D Substructures Limited 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 D & D Substructures Limited do?
D & D Substructures Limited is registered under Development of building projects (SIC 41100); Construction of other civil engineering projects n.e.c. (SIC 42990); Other construction installation (SIC 43290).
How old is D & D Substructures Limited?
D & D Substructures Limited was incorporated on 15 August 2024, 2 years ago.
Who runs D & D Substructures Limited?
D & D Substructures Limited has 2 active directors, the longest-serving appointed in Aug 2024. Their names and service addresses are on the Companies House register.
Who owns D & D Substructures Limited?
2 people or companies have significant control of D & D Substructures Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if D & D Substructures Limited 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 D & D Substructures Limited 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.