- Companies
- Installers
- London
- M3 Design Development Limited
M3 Design Development Limited
- Company number
- 05277573
- Incorporated
- 4 Nov 200421 years trading
- Registered office
- Po1 the Old Power Station, 121 Mortlake High Street, London, SW14 8SN
- Nature of business
- Other construction installation
M3 Design Development Limited is a 21-year-old private limited company registered in London, company number 05277573, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £368K (+12.4%) on the year before, to £3.3M.
- Net assets rose in 9 of 9 year-on-year comparisons on record.
- Current assets of £5.2M against £2M owed within a year: 2.6 times cover.
- 17 employees on average, up from 4 the year before.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £3.3M | £3.4M | £5.2M | £2M | 17 |
| 31 Mar 2025 | £3M | £2.8M | £5.2M | £2.2M | 4 |
| 31 Mar 2024 | £2.6M | £1.3M | £3.9M | £1.4M | 4 |
| 31 Mar 2023 | £2.1M | £1.3M | £3.5M | £1.4M | 7 |
| 31 Mar 2022 | £1M | £498K | £1.9M | £886K | 4 |
| 31 Mar 2021 | £727K | £495K | £1.3M | £588K | 5 |
| 31 Mar 2020 | £683K | £24K | £1.2M | £517K | 6 |
| 31 Mar 2019 | £496K | £618K | £904K | £415K | 6 |
| 31 Mar 2018 | £465K | £497K | £866K | £414K | 6 |
| 31 Mar 2017 | £393K | £910K | £1.5M | £1.1M | 5 |
Public contracts won
M3 Design Development Limited has one public sector contract award on record; the ones with their own published value total £2.3M (2022). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Colchester Borough Council | GB-Colchester: Rowan House Refurbishment | £2.3M | 15 Mar 2022 |
Where M3 Design Development Limited is registered
The registered office is in London (SW14), in the Richmond upon Thames local authority area, London. Show SW14 8SN on a map.
Other trade companies in SW14
- Thames Air Solutions LtdPlumbers and heating engineers
- Hayden Window LtdCleaning companies
- Alkaya Development LtdProperty developers
- C&C Cleaning LtdCleaning companies
- R&S Wheel LimitedMotor traders
- Arcload LtdBuilders
- Bespoke Home Repair LtdRepair services
- The Stanley Collective LtdProperty developers
What happens if M3 Design Development 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 05277573
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2004 (21 years ago)
- Registered office
- Po1 the Old Power Station, 121 Mortlake High Street, London, SW14 8SN
- 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 2026
- Last confirmation statement
- 4 November 2025
- Charges (mortgages)
- 2 outstanding of 3 registered
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.
- Ma&Ra Fire Limited2023
- Mac Volt UK Ltd2025
- Mac's Shop Fitting Ltd2025
- Maestro Brothers Limited2016
- Maggy Construction Ltd2025
- Magic Drywall Ltd2023
- Magic Fire Solutions Ltd2023
- Maida Vale Trades Limited2025
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are M3 Design Development Limited's accounts due?
M3 Design Development Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is M3 Design Development Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is M3 Design Development Limited still trading?
M3 Design Development 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 M3 Design Development Limited do?
M3 Design Development Limited is registered under Other construction installation (SIC 43290).
How old is M3 Design Development Limited?
M3 Design Development Limited was incorporated on 4 November 2004, 21 years ago.
Has M3 Design Development Limited won public sector contracts?
Yes. M3 Design Development Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £2.3M), most recently from Colchester Borough Council.
What is the penalty if M3 Design Development 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 M3 Design Development 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.