- Companies
- Specialist contractors
- London
- SD Design and Build Consultants Ltd
SD Design and Build Consultants Ltd
- Company number
- 16131189
- Incorporated
- 11 Dec 20241 year trading
- Registered office
- 3RD Floor, 86-90, Paul Street, London, England, EC2A 4NE
- Nature of business
- Other specialised construction activities n.e.c.
SD Design and Build Consultants Ltd is a 1-year-old private limited company registered in London, company number 16131189, one of 4,318 specialist construction companies in London. Companies House shows its accounts as overdue: they were due on 11 September 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 SD Design and Build Consultants Ltd is registered
The registered office is in London (EC2A), in the Hackney local authority area, London. Show EC2A 4NE on a map.
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- A2D Professional Cleaning LtdCleaning companies
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- SJK Construction & Management LtdBuilders
- Cenlora Cleaning Group LtdCleaning companies
Shared registered office
1,581 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 Design and Build Consultants 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 | 12 Sep 2026 to 11 Oct 2026 | £150 |
| 1 to 3 months late | 12 Oct 2026 to 11 Dec 2026 | £375 |
| 3 to 6 months late | 12 Dec 2026 to 11 Mar 2027 | £750 |
| More than 6 months late | From 12 Mar 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 16131189
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 December 2024 (1 year ago)
- Registered office
- 3RD Floor, 86-90, Paul Street, London, England, EC2A 4NE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 23 January 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- SDB Construction Ltd2017
- Sdim Engineering Ltd2016
- SDL Rigging Ltd2023
- Sdluxe Ltd2023
- Se1 Projects Ltd2026
- Sea Lighter Property Services Ltd2026
- Seabass Scenery & Carpentry Ltd.2016
- Sean's Fencing Limited2015
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are SD Design and Build Consultants Ltd's accounts due?
SD Design and Build Consultants Ltd's accounts were due at Companies House on 11 September 2026 and the register shows them as overdue.
When is SD Design and Build Consultants 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 10 December 2025, due by 10 December 2026, and one for the period to 31 December 2025, due by 31 December 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is SD Design and Build Consultants Ltd still trading?
SD Design and Build Consultants 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 SD Design and Build Consultants Ltd do?
SD Design and Build Consultants Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is SD Design and Build Consultants Ltd?
SD Design and Build Consultants Ltd was incorporated on 11 December 2024, 1 year ago.
What is the penalty if SD Design and Build Consultants 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 Design and Build Consultants 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.