- Companies
- Installers
- London
- Mdy Construction Ltd
Mdy Construction Ltd
- Company number
- 15551438
- Incorporated
- 9 Mar 20242 years trading
- Registered office
- Flat 1, 83 Station Road, London, NW4 4PA
- Nature of business
- Other construction installation
Mdy Construction Ltd is a 2-year-old private limited company registered in London, company number 15551438, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 March 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Mdy Construction Ltd is registered
The registered office is in London (NW4), in the Barnet local authority area, London. Show NW4 4PA on a map.
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What happens if Mdy 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15551438
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 March 2024 (2 years ago)
- Registered office
- Flat 1, 83 Station Road, London, NW4 4PA
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 7 March 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Me and Them Creatives Ltd2026
- Meaney Property Services Ltd2025
- Medlock Ltd2026
- Mefisto Welding Services Ltd2026
- Melmart Construction Limited2026
- Mend and Build Limited2024
- Mendra Services Ltd2026
- Meridian Heights Ltd2024
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Mdy Construction Ltd's accounts due?
Mdy Construction Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Mdy Construction Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Mdy Construction Ltd still trading?
Mdy 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 Mdy Construction Ltd do?
Mdy Construction Ltd is registered under Other construction installation (SIC 43290).
How old is Mdy Construction Ltd?
Mdy Construction Ltd was incorporated on 9 March 2024, 2 years ago.
What is the penalty if Mdy 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 Mdy 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.