- Company number
- 04256131
- Incorporated
- 20 Jul 200125 years trading
- Registered office
- 1 Cumberland Avenue, London, NW10 7RX
- Nature of business
- Glazing; Other building completion and finishing
Perfect Crystal Windows Limited is a 25-year-old private limited company registered in London, company number 04256131, one of 307 glazing companies in London. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £4,637 (-2.1%) on the year before, to £221K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £1.7M against £1.9M owed within a year: 0.9 times cover.
- 14 employees on average, down from 15 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £221K | £1.7M | £1.9M | 14 | |
| 31 Jul 2024 | £225K | £1.4M | £1.5M | 15 | |
| 31 Jul 2023 | £111K | £1.7M | £1.9M | 17 | |
| 31 Jul 2022 | £58K | £58K | £1.6M | £2M | 32 |
| 31 Jul 2021 | £100K | £195K | £766K | £1.3M | 38 |
| 31 Jul 2020 | £175K | £353K | £1.2M | £1.1M | 34 |
| 31 Jul 2019 | £753K | £30K | £1.5M | £1.2M | 42 |
| 31 Jul 2018 | £700K | £21K | £1.3M | £1.1M | |
| 31 Jul 2017 | £587K | £111K | £1.3M | £1.2M | 38 |
| 31 Jul 2016 | £516K | £45K | £1M | £982K |
Where Perfect Crystal Windows Limited is registered
The registered office is in London (NW10), in the Brent local authority area, London. Show NW10 7RX on a map.
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What happens if Perfect Crystal 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 04256131
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 July 2001 (25 years ago)
- Registered office
- 1 Cumberland Avenue, London, NW10 7RX
- Nature of business
- Glazing (SIC 43342)
Other building completion and finishing (SIC 43390) - Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 1 September 2026
- Charges (mortgages)
- 3 outstanding of 6 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 London
Other active glazing companies registered in London.
- Perspective Glass London Ltd2026
- Pet Flaps in Glass Ltd2025
- Peterborough Doors Limited2023
- PND Technologies Ltd2014
- Porter Renovations Ltd2026
- Premier Windows Ltd1999
- Primeshade Solutions Limited2025
- Professional Refurbishment Co. Limited1995
All glazing companies in London · All trades in London · Glaziers across the UK
Frequently asked questions
When are Perfect Crystal Windows Limited's accounts due?
Perfect Crystal Windows Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Perfect Crystal Windows Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Perfect Crystal Windows Limited still trading?
Perfect Crystal Windows 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 Perfect Crystal Windows Limited do?
Perfect Crystal Windows Limited is registered under Glazing (SIC 43342); Other building completion and finishing (SIC 43390).
How old is Perfect Crystal Windows Limited?
Perfect Crystal Windows Limited was incorporated on 20 July 2001, 25 years ago.
What is the penalty if Perfect Crystal 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 Perfect Crystal Windows 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.