- Companies
- Property developers
- Wimbledon
- 30 Day Extensions Limited
30 Day Extensions Limited
- Company number
- 11142668
- Incorporated
- 10 Jan 20188 years trading
- Registered office
- 142 Merton Road, Wimbledon, SW19 1EH
- Nature of business
- Development of building projects; Other specialised construction activities n.e.c.
30 Day Extensions Limited is a 8-year-old private limited company registered in Wimbledon, company number 11142668, one of 59 property development companies in Wimbledon. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
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 £47K (+522.3%) on the year before, to £56K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £248K against £284K owed within a year: 0.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £56K | £248K | £284K | 1 | |
| 31 Jan 2024 | £8,983 | £2,748 | £138K | £81K | 1 |
| 31 Jan 2023 | £12K | £73K | £99K | £28K | 2 |
| 31 Jan 2022 | £724 | £2,642 | £95K | £50K | 1 |
| 31 Jan 2021 | -£36K | £44K | £62K | £54K | 1 |
| 31 Jan 2020 | £1,616 | £11K | £9,712 | 1 | |
| 31 Jan 2019 | £830 | £4,308 | £3,478 |
Where 30 Day Extensions Limited is registered
The registered office is in Wimbledon (SW19), in the Merton local authority area, London. Show SW19 1EH on a map.
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- Rainbow One Construction UK LtdSpecialist contractors
- Base Bloc LimitedBuilders
- Concealed Climate LimitedPlumbers and heating engineers
- Morningside LtdProperty developers
- Cupi-Building LtdBuilders
- Crown Infra London LtdBuilders
- Aj & Co One LtdProperty developers
Also registered at this address
6 other companies use the same registered office as 30 Day Extensions Limited.
- 30 Day Extensions Kingston LtdProperty developers
- 30 Day Extensions Wandsworth LtdBuilders
- 30 Day Extensions Wimbledon LtdProperty developers
- 6 Day Extensions LimitedBuilders
- Design30 Architecture LtdProperty developers
- House Extension Shop LtdBuilders
What happens if 30 Day Extensions 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11142668
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 January 2018 (8 years ago)
- Registered office
- 142 Merton Road, Wimbledon, SW19 1EH
- Nature of business
- Development of building projects (SIC 41100)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 27 September 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 Wimbledon
Other active property development companies registered in Wimbledon.
- Armabiollon Limited2015
- Artin Homes Ltd.2017
- Badger 2018 Limited2018
- Black Square London Limited2013
- Boyd Morison Limited2022
- Brasted Investments (Southwark) Limited2018
- Brasted Investments (Woolwich) Ltd2015
- Brasted Investments Limited2014
All property development companies in Wimbledon · All trades in Wimbledon · Property developers across the UK
Frequently asked questions
When are 30 Day Extensions Limited's accounts due?
30 Day Extensions Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is 30 Day Extensions Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is 30 Day Extensions Limited still trading?
30 Day Extensions Limited is listed as active on the Companies House register (checked 12 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 30 Day Extensions Limited do?
30 Day Extensions Limited is registered under Development of building projects (SIC 41100); Other specialised construction activities n.e.c. (SIC 43999).
How old is 30 Day Extensions Limited?
30 Day Extensions Limited was incorporated on 10 January 2018, 8 years ago.
What is the penalty if 30 Day Extensions 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 30 Day Extensions Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.