- Companies
- Facilities management
- London
- The Conservation Sash Window Company Ltd
The Conservation Sash Window Company Ltd
- Company number
- 09137007
- Incorporated
- 18 Jul 201412 years trading
- Registered office
- 3 Wedmore Street, London, N19 4RU
- Nature of business
- Combined facilities support activities
The Conservation Sash Window Company Ltd is a 12-year-old private limited company registered in London, company number 09137007, one of 689 facilities management companies in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £4,567 (-112.6%) on the year before, to -£512.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £84K against £95K owed within a year: 0.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | -£512 | £3,252 | £84K | £95K | 1 |
| 31 Dec 2024 | £4,055 | £1,602 | £55K | £64K | 1 |
| 31 Dec 2023 | £12K | £24K | £48K | £41K | 1 |
| 31 Dec 2022 | -£2,599 | £5,457 | £56K | £45K | 1 |
| 31 Dec 2021 | £404 | £6,033 | £88K | £87K | 1 |
| 31 Dec 2020 | £3 | £68K | £58K | 1 | |
| 31 Dec 2019 | -£14K | £2,888 | £38K | £63K | 1 |
| 31 Dec 2018 | -£14K | £63 | £23K | £50K | |
| 31 Dec 2017 | -£17K | £142 | £33K | £58K | |
| 31 Dec 2016 | -£7,071 | £106 | £18K | £33K |
Where The Conservation Sash Window Company Ltd is registered
The registered office is in London (N19), in the Islington local authority area, London. Show N19 4RU on a map.
Other trade companies in N19
- DR Pro Services LtdCleaning companies
- Rams Property Services LtdSpecialist contractors
- Lushi Plumbing and Heating LtdPlumbers and heating engineers
- One Fix Gutter Solutions LtdRoofers
- Mmway Construction LtdSpecialist contractors
- Elio's Landscaping Ltd LtdBuilders
- Novix Smart Wash LtdMachinery repair and installation
- Alex Maintenance LtdPainters and decorators
Also registered at this address
5 other companies use the same registered office as The Conservation Sash Window Company Ltd.
- D&G Construction & Electrical LimitedBuilders
- Fab Mechanical LtdInstallers
- London Sash Windows & Doors LtdPlasterers
- The London and Essex Door Company LtdInstallers
- Victory Construction Cost Consultants LtdSpecialist contractors
What happens if The Conservation Sash Window Company 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09137007
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 July 2014 (12 years ago)
- Registered office
- 3 Wedmore Street, London, N19 4RU
- Nature of business
- Combined facilities support activities (SIC 81100)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 18 July 2026
Filing notes for facilities management companies
Facilities management companies usually invoice on contract, so accrued income and deferred income matter at the year end.
Similar companies in London
Other active facilities management companies registered in London.
- The Continental Group Limited2025
- The Covent Group Ltd2024
- The Cyntra Group Ltd2025
- The Impact Ministry Limited2024
- The Maintenance Guys Ltd2016
- The PCS Group Limited1987
- The Property Maintenance Co. (U.K) Ltd2026
- The Tutela Group Ltd2023
All facilities management companies in London · All trades in London · Facilities management across the UK
Frequently asked questions
When are The Conservation Sash Window Company Ltd's accounts due?
The Conservation Sash Window Company Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is The Conservation Sash Window Company Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is The Conservation Sash Window Company Ltd still trading?
The Conservation Sash Window Company 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 The Conservation Sash Window Company Ltd do?
The Conservation Sash Window Company Ltd is registered under Combined facilities support activities (SIC 81100).
How old is The Conservation Sash Window Company Ltd?
The Conservation Sash Window Company Ltd was incorporated on 18 July 2014, 12 years ago.
What is the penalty if The Conservation Sash Window Company 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 The Conservation Sash Window Company 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.