- Companies
- Specialist contractors
- Johnstone
- Conservatory Conversions & Windows Limited
Conservatory Conversions & Windows Limited
- Company number
- SC574273
- Incorporated
- 21 Aug 20179 years trading
- Registered office
- 71/1 High Street, Johnstone, PA5 8QG
- Nature of business
- Other specialised construction activities n.e.c.
Conservatory Conversions & Windows Limited is a 9-year-old private limited company registered in Johnstone, company number SC574273, one of 8 specialist construction companies in Johnstone. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £2,900 (+374.2%) on the year before, to £3,675.
- Net assets rose in 5 of 7 year-on-year comparisons on record.
- Current assets of £44K against £50K owed within a year: 0.9 times cover.
- 3 employees on average, up from -3 the year before.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £3,675 | £24K | £44K | £50K | 3 |
| 31 Aug 2024 | £775 | £39K | £51K | -3 | |
| 31 Aug 2023 | £774 | £56K | £48K | -3 | |
| 31 Aug 2022 | £4,205 | £48K | £50K | 3 | |
| 31 Aug 2021 | £997 | £51K | £55K | 3 | |
| 31 Aug 2020 | £3,513 | £37K | £31K | 3 | |
| 31 Aug 2019 | £1,466 | £31K | £36K | ||
| 31 Aug 2018 | £1,262 | £22K | £29K |
Where Conservatory Conversions & Windows Limited is registered
The registered office is in Johnstone (PA5), in the Renfrewshire local authority area, Scotland. Show PA5 8QG on a map.
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- CLM Build Projects LtdProperty developers
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What happens if Conservatory Conversions & Windows 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- SC574273
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 August 2017 (9 years ago)
- Registered office
- 71/1 High Street, Johnstone, PA5 8QG
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 22 September 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Johnstone
Other active specialist construction companies registered in Johnstone.
- Giemar Engineering Ltd2014
- McGaw Electrical Management Services Ltd2026
- Montserrat Construction Services Limited2023
- Mooster Maintenance Ltd2026
- Ropes and Rigs Ltd2025
- Cairn Developments (Sco) Ltd2025
- Charliebuoy Ltd2023
All specialist construction companies in Johnstone · All trades in Johnstone · Specialist contractors across the UK
Frequently asked questions
When are Conservatory Conversions & Windows Limited's accounts due?
Conservatory Conversions & Windows Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Conservatory Conversions & Windows Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Conservatory Conversions & Windows Limited still trading?
Conservatory Conversions & Windows Limited is listed as active on the Companies House register (checked 13 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 Conservatory Conversions & Windows Limited do?
Conservatory Conversions & Windows Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Conservatory Conversions & Windows Limited?
Conservatory Conversions & Windows Limited was incorporated on 21 August 2017, 9 years ago.
What is the penalty if Conservatory Conversions & Windows 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 Conservatory Conversions & Windows Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.