- Companies
- Property developers
- London
- Extensions Prolab Limited
Extensions Prolab Limited
- Company number
- 15655078
- Incorporated
- 17 Apr 20242 years trading
- Registered office
- 5TH Floor, 167-169 Great Portland Street, London, W1W 5PF
- Nature of business
- Development of building projects; Construction of domestic buildings; Retail sale via mail order houses or via Internet; Hairdressing and other beauty treatment
Extensions Prolab Limited is a 2-year-old private limited company registered in London, company number 15655078, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 down £805 (-16.8%) on the year before, to -£5,597.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | -£5,597 | 1 | |||
| 30 Apr 2024 | -£4,792 | 1 |
Where Extensions Prolab Limited is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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- Aurum Cooling LtdPlumbers and heating engineers
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Also registered at this address
17 other companies use the same registered office as Extensions Prolab Limited.
- Andrew Penny LimitedFinishing trades
- Brisk Climate LimitedPlumbers and heating engineers
- Brokemanz Garage LtdMotor traders
- Casa Squared LtdCleaning companies
- Consultalift LimitedSpecialist contractors
- DVMC LimitedCleaning companies
- Elite Utility Services LtdCivil engineering
- Garden Empire Landscapes LtdLandscapers and gardeners
- Glaes LtdElectricians
- Khakh Construction LtdBuilders
- LG Marine UK LtdMachinery repair and installation
- MDC Structures LimitedCivil engineering
- Rendervate Rendering LtdFinishing trades
- Valentine Consultants LtdProperty developers
- Winning Walls LtdProperty developers
- Yellow Van LtdBuilders
- ZM Wraps LtdMotor traders
What happens if Extensions Prolab 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 15655078
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 April 2024 (2 years ago)
- Registered office
- 5TH Floor, 167-169 Great Portland Street, London, W1W 5PF
- Nature of business
- Development of building projects (SIC 41100)
Construction of domestic buildings (SIC 41202)
Retail sale via mail order houses or via Internet (SIC 47910)
Hairdressing and other beauty treatment (SIC 96020) - Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 16 April 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 London
Other active property development companies registered in London.
- Extention Properties Limited2024
- Exterior Property Shields Limited2025
- Eye for Detail Architects Ltd2018
- Eyke Property Investments Limited2020
- Eyre Interiors Ltd2013
- Eysi Investment Ltd2020
- Ezra Property Co. Limited1973
- F H Construction London Ltd2019
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Extensions Prolab Limited's accounts due?
Extensions Prolab Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Extensions Prolab Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Extensions Prolab Limited still trading?
Extensions Prolab 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 Extensions Prolab Limited do?
Extensions Prolab Limited is registered under Development of building projects (SIC 41100); Construction of domestic buildings (SIC 41202); Retail sale via mail order houses or via Internet (SIC 47910); Hairdressing and other beauty treatment (SIC 96020).
How old is Extensions Prolab Limited?
Extensions Prolab Limited was incorporated on 17 April 2024, 2 years ago.
What is the penalty if Extensions Prolab 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 Extensions Prolab 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.