- Companies
- Property developers
- Isleworth
- CSM Design Ltd
CSM Design Ltd
- Company number
- 13964460
- Incorporated
- 9 Mar 20224 years trading
- Registered office
- A M S South Street House, 51 South Street, Isleworth, Middlesex, TW7 7AA
- Nature of business
- Development of building projects; Construction of domestic buildings
CSM Design Ltd is a 4-year-old private limited company registered in Isleworth, company number 13964460, one of 72 property development companies in Isleworth. 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 down £1,931 (-165.8%) on the year before, to -£766.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £435 against £661 owed within a year: 0.7 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | -£766 | £435 | £661 | 0 | |
| 31 Mar 2025 | £1,165 | £2,226 | £521 | 0 | |
| 31 Mar 2024 | £713 | £2,424 | £1,171 | 0 | |
| 31 Mar 2023 | £134 | £4,467 | £3,793 | 0 |
Where CSM Design Ltd is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 7AA on a map.
Other trade companies in TW7
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- V&R Construction Group LtdBuilders
- Gio Construction LimitedBuilders
- S & H Bodywork LtdMechanics and garages
- KS Garage Isleworth LtdMotor traders
- C Wiseman Services LtdCleaning companies
- Avenida Developments LtdProperty developers
- Courtesy Cars Group UK LtdMotor traders
Also registered at this address
23 other companies use the same registered office as CSM Design Ltd.
- A.Bayes Services Ltd.Scaffolders
- Bellpark Developments LimitedProperty developers
- Buch Construction LimitedSpecialist contractors
- Calton Development LimitedProperty developers
- Cda 1 LimitedSpecialist contractors
- City Electrical LimitedElectricians
- Creative Developments Properties LimitedProperty developers
- Elysian Developments Group LimitedProperty developers
- Elysian One LimitedProperty developers
- Elysian the Drive LimitedProperty developers
- Formwork Engineering Consultancies LimitedSpecialist contractors
- FRG Services LimitedPainters and decorators
- Fruit and Barley LimitedInstallers
- Heating & Oven Technology LimitedMachinery repair and installation
- Iconic Building Services LimitedBuilders
- Irt Electrical Services LimitedElectricians
- James Electrical Services LtdElectricians
- James Plumbing and Heating LimitedPlumbers and heating engineers
- Landmark Building Services LtdBuilders
- Mark Curtis Roofing Services LimitedRoofers
- Stop Digging Warwickshire LimitedGroundworks and demolition
- The Tyre Rack Auto Repair LimitedMechanics and garages
- Volen2024 LimitedJoiners and carpenters
What happens if CSM Design 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 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
- 13964460
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 March 2022 (4 years ago)
- Registered office
- A M S South Street House, 51 South Street, Isleworth, Middlesex, TW7 7AA
- Nature of business
- Development of building projects (SIC 41100)
Construction of domestic buildings (SIC 41202) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 8 March 2026
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 Isleworth
Other active property development companies registered in Isleworth.
- Dion Homes Ltd2019
- Dion Management Ltd2019
- Easyways Removals Ltd2023
- Eden Side Ltd2026
- Elysian Developments Group Limited2025
- Elysian One Limited2025
- Elysian Projects Ltd2020
- Elysian the Drive Limited2025
All property development companies in Isleworth · All trades in Isleworth · Property developers across the UK
Frequently asked questions
When are CSM Design Ltd's accounts due?
CSM Design Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is CSM Design Ltd'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 CSM Design Ltd still trading?
CSM Design 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 CSM Design Ltd do?
CSM Design Ltd is registered under Development of building projects (SIC 41100); Construction of domestic buildings (SIC 41202).
How old is CSM Design Ltd?
CSM Design Ltd was incorporated on 9 March 2022, 4 years ago.
What is the penalty if CSM Design 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 CSM Design 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.