- Company number
- 04367514
- Incorporated
- 5 Feb 200224 years trading
- Registered office
- 32 Mulberry Way, Armthorpe, Doncaster, DN3 3UE
- Nature of business
- Glazing
Castle Windows & Conservatories Limited is a 24-year-old private limited company registered in Doncaster, company number 04367514, one of 22 glazing companies in Doncaster. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £5,587 (-5.3%) on the year before, to £101K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £170K against £91K owed within a year: 1.9 times cover.
- 5 employees on average, up from 4 the year before.
- 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £101K | £170K | £91K | 5 | |
| 28 Feb 2024 | £106K | £152K | £79K | 4 | |
| 28 Feb 2023 | £126K | £174K | £98K | 4 | |
| 28 Feb 2022 | £110K | £138K | £94K | 4 | |
| 28 Feb 2021 | £54K | £93K | £97K | 5 | |
| 28 Feb 2020 | £44K | £70K | £91K | 4 | |
| 28 Feb 2019 | £42K | £72K | £103K | ||
| 28 Feb 2018 | £26K | £59K | £100K | ||
| 28 Feb 2017 | £18K | £65K | £83K | ||
| 29 Feb 2016 | £309 | £15K | £53K | £84K |
Who runs and owns Castle Windows & Conservatories Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| J*** D*** | Director | Feb 2002 |
| G*** B*** | Secretary | Jun 2006 |
4 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| J*** D*** | Secretary | Feb 2002 | Oct 2009 |
| Incorporate Secretariat Limited | Corporate Nominee Secretary | Feb 2002 | May 2002 |
| P*** G*** | Director | Feb 2002 | Jun 2006 |
| Incorporate Directors Limited | Nominee director (company) | Feb 2002 | May 2002 |
Person with significant control
Charges (secured borrowing)
1 of 1 registered charge is outstanding. A charge is security a lender takes over a company's assets, typically for a loan, mortgage or asset finance.
| Lender | Status | Registered |
|---|---|---|
| HSBC Bank PLC | Outstanding | Jul 2007 |
Where Castle Windows & Conservatories Limited is registered
The registered office is in Doncaster (DN3), in the Doncaster local authority area, Yorkshire and The Humber. Show DN3 3UE on a map.
Other trade companies in DN3
- Oak & Prosper York LimitedProperty developers
- ST Leger Paving LimitedInstallers
- Lucent Electrical LtdElectricians
- Alfa Scaffolding & Brickwork LimitedCivil engineering
- Hso Fastfit Tyres LtdMechanics and garages
- Cheri Valley Construction Co LtdInstallers
- Razor Sharp Interiors LtdFinishing trades
- Reebuilt LimitedInstallers
Shared registered office
28 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Castle Windows & Conservatories 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 04367514
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 February 2002 (24 years ago)
- Registered office
- 32 Mulberry Way, Armthorpe, Doncaster, DN3 3UE
- Nature of business
- Glazing (SIC 43342)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 5 February 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for glazing companies
Glazing companies often take deposits before work starts. Deposits held at the year end are a liability, not income, until the job is done.
Similar companies in Doncaster
Other active glazing companies registered in Doncaster.
- Conway Conservatories Ltd2014
- David Bodman Glass & Glazing Limited2011
- DCM Architectural Ltd2024
- Glaze of Glory Ltd2024
- Greg Thompson Limited2017
- JF Bodman Ltd2011
- L & J Window Installations Limited2005
- Lucent Glass Ltd2024
All glazing companies in Doncaster · All trades in Doncaster · Glaziers across the UK
Frequently asked questions
When are Castle Windows & Conservatories Limited's accounts due?
Castle Windows & Conservatories Limited's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Castle Windows & Conservatories Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Castle Windows & Conservatories Limited still trading?
Castle Windows & Conservatories 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 Castle Windows & Conservatories Limited do?
Castle Windows & Conservatories Limited is registered under Glazing (SIC 43342).
How old is Castle Windows & Conservatories Limited?
Castle Windows & Conservatories Limited was incorporated on 5 February 2002, 24 years ago.
Who runs Castle Windows & Conservatories Limited?
Castle Windows & Conservatories Limited has 1 active director, the longest-serving appointed in Feb 2002. Their names and service addresses are on the Companies House register.
Who owns Castle Windows & Conservatories Limited?
One person or company has significant control of Castle Windows & Conservatories Limited: an individual (owns 25% to 50% of the shares).
What is the penalty if Castle Windows & Conservatories 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 Castle Windows & Conservatories 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.