Byzen Ltd
- Company number
- 13060153
- Incorporated
- 3 Dec 20205 years trading
- Registered office
- C/O Opia Accountancy, Old Town Hall, 30 Tweedy Road, Bromley, BR1 3FE
- Nature of business
- Other specialised construction activities n.e.c.; Management consultancy activities other than financial management
Byzen Ltd is a 5-year-old private limited company registered in Bromley, company number 13060153, one of 91 specialist construction companies in Bromley. 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 up £250 (+19.8%) on the year before, to £1,514.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £1,514 | £97 | £0 | 0 | |
| 31 Jul 2024 | £1,264 | £497 | £0 | 0 | |
| 31 Jul 2023 | £1,264 | £506 | 0 | ||
| 31 Jul 2022 | £1,081 | £689 | £0 | 1 | |
| 31 Jul 2021 | £193 | £6,082 | £5,889 | 1 |
Where Byzen Ltd is registered
The registered office is in Bromley (BR1), in the Bromley local authority area, London. Show BR1 3FE on a map.
Other trade companies in BR1
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- E.Esoteric LimitedElectricians
- Ideal Move Properties LimitedProperty developers
- Slick Moves London LtdMachinery repair and installation
- Greenwoods Home & Garden Services LimitedCleaning companies
- Primecroft Group LtdBuilders
- Rapid Emergency Plumbers London LtdPlumbers and heating engineers
- Faspen LtdCleaning companies
Also registered at this address
2 other companies use the same registered office as Byzen Ltd.
- Os Tech Solutions LtdRepair services
- Safe Steel LimitedInstallers
What happens if Byzen 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 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
- 13060153
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 December 2020 (5 years ago)
- Registered office
- C/O Opia Accountancy, Old Town Hall, 30 Tweedy Road, Bromley, BR1 3FE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 2 December 2025
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 Bromley
Other active specialist construction companies registered in Bromley.
- Campbell Carpentry Ltd2015
- Capital Developments & Maintenance Limited2011
- Central & City Properties Limited1972
- Chasefield (Construction) Limited1991
- Colliers Insulation Limited2022
- Cornerstone Pre-Construction Ltd2026
- CTK Developments Ltd2026
- D&T Building Ltd2015
All specialist construction companies in Bromley · All trades in Bromley · Specialist contractors across the UK
Frequently asked questions
When are Byzen Ltd's accounts due?
Byzen Ltd's next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is Byzen Ltd'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 Byzen Ltd still trading?
Byzen 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 Byzen Ltd do?
Byzen Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Management consultancy activities other than financial management (SIC 70229).
How old is Byzen Ltd?
Byzen Ltd was incorporated on 3 December 2020, 5 years ago.
What is the penalty if Byzen 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 Byzen 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.