- Company number
- 03395002
- Incorporated
- 30 Jun 199729 years trading
- Registered office
- c/o Duboff & Co, Kingsbury House, 468 Church Lane, London, NW9 8UA
- Nature of business
- Glazing
Paragon Windows Ltd is a 29-year-old private limited company registered in London, company number 03395002, one of 307 glazing companies in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 30 December 2026 is due at HMRC on 30 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 £897 (-6.8%) on the year before, to £12K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £3,961 against £16K owed within a year: 0.2 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 |
|---|---|---|---|---|---|
| 30 Dec 2025 | £12K | £3,961 | £16K | 1 | |
| 31 Dec 2024 | £13K | £3,888 | £17K | 1 | |
| 30 Dec 2023 | £14K | £3,761 | £17K | 1 | |
| 31 Dec 2022 | £14K | £4,026 | £18K | 1 | |
| 31 Dec 2021 | £14K | £4,268 | £19K | 1 | |
| 31 Dec 2020 | £15K | £2,126 | £17K | 1 | |
| 31 Dec 2019 | £15K | £476 | £16K | 1 | |
| 31 Dec 2018 | £15K | £182 | £16K | ||
| 31 Dec 2017 | -£15K | £16K | |||
| 31 Dec 2016 | -£16K | £16K | 1 |
Where Paragon Windows Ltd is registered
The registered office is in London (NW9), in the Brent local authority area, London. Show NW9 8UA on a map.
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- P Auto Motor LtdMechanics and garages
- Euro Car Glass LtdMechanics and garages
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Also registered at this address
13 other companies use the same registered office as Paragon Windows Ltd.
- Arados Associates LtdCivil engineering
- Cosier Heat LtdPlumbers and heating engineers
- Crixsley Developments LimitedBuilders
- Engcon Plant Hire LtdSpecialist contractors
- Kee Projects LtdBuilders
- London RC LimitedBuilders
- NJD Consultancy LtdCivil engineering
- NP Builders & Developers LtdSpecialist contractors
- Onyxite LtdMotor traders
- Paragon Glasservices LtdGlaziers
- Prime Line Collisions LtdMechanics and garages
- Rite Construction LimitedSpecialist contractors
- Sculpture LtdProperty developers
What happens if Paragon Windows 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 | 31 Dec 2027 | £200 |
| 3 months late | 30 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 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
- 03395002
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 June 1997 (29 years ago)
- Registered office
- c/o Duboff & Co, Kingsbury House, 468 Church Lane, London, NW9 8UA
- Nature of business
- Glazing (SIC 43342)
- Year end
- 30 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 December 2025
- Last confirmation statement
- 30 June 2026
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.
- Patrope Window Design and Installations Ltd2025
- Pearson Glazing Ltd2000
- Peckham Glass Ltd2021
- Perfect Crystal Windows Limited2001
- Perspective Glass London Ltd2026
- Pet Flaps in Glass Ltd2025
- Peterborough Doors Limited2023
- PND Technologies Ltd2014
All glazing companies in London · All trades in London · Glaziers across the UK
Frequently asked questions
When are Paragon Windows Ltd's accounts due?
Paragon Windows Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 30 December 2026.
When is Paragon Windows Ltd's CT600 due?
The CT600 for the period to 30 December 2026 is due at HMRC by 30 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Paragon Windows Ltd still trading?
Paragon Windows 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 Paragon Windows Ltd do?
Paragon Windows Ltd is registered under Glazing (SIC 43342).
How old is Paragon Windows Ltd?
Paragon Windows Ltd was incorporated on 30 June 1997, 29 years ago.
What is the penalty if Paragon Windows 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 Paragon Windows 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.