SDMK Ltd
- Company number
- 17221865
- Incorporated
- 15 May 2026
- Registered office
- 7, the Smithyside, Bell Villas, Newcastle upon Tyne, NE20 9BD
- Nature of business
- Development of building projects
SDMK Ltd is a newly incorporated private limited company registered in Newcastle upon Tyne, company number 17221865, one of 354 property development companies in Newcastle upon Tyne. Its next accounts are due at Companies House on 15 February 2028, and its first CT600 is due at HMRC on 14 May 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 SDMK Ltd is registered
The registered office is in Newcastle upon Tyne (NE20), in the Northumberland local authority area, North East. Show NE20 9BD on a map.
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What happens if SDMK 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 15 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 16 Feb 2028 to 15 Mar 2028 | £150 |
| 1 to 3 months late | 16 Mar 2028 to 15 May 2028 | £375 |
| 3 to 6 months late | 16 May 2028 to 15 Aug 2028 | £750 |
| More than 6 months late | From 16 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 17221865
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 May 2026
- Registered office
- 7, the Smithyside, Bell Villas, Newcastle upon Tyne, NE20 9BD
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 Newcastle upon Tyne
Other active property development companies registered in Newcastle upon Tyne.
- Sea Island Developments (Ponteland) Limited2016
- Sea Island Developments Limited2016
- Sean Wood Property Company Limited2017
- Seimuuc Direct Services Limited2025
- Select Living Limited2019
- SFT Trading Ltd2025
- SGPM (Ne) Limited2024
- Shore Real Estate Limited2016
All property development companies in Newcastle upon Tyne · All trades in Newcastle upon Tyne · Property developers across the UK
Frequently asked questions
When are SDMK Ltd's accounts due?
SDMK Ltd's next accounts are due at Companies House by 15 February 2028 (in 491 days), covering the period to 31 May 2027.
When is SDMK 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 14 May 2027, due by 14 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is SDMK Ltd still trading?
SDMK 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 SDMK Ltd do?
SDMK Ltd is registered under Development of building projects (SIC 41100).
How old is SDMK Ltd?
SDMK Ltd was incorporated on 15 May 2026, less than a year ago.
What is the penalty if SDMK 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 SDMK 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.