- Companies
- Property developers
- London
- Crystalfix Ltd
Crystalfix Ltd
- Company number
- 14837130
- Incorporated
- 1 May 20233 years trading
- Registered office
- 5 Brayford Square, London, E1 0SG
- Nature of business
- Development of building projects
Crystalfix Ltd is a 3-year-old private limited company registered in London, company number 14837130, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £2,676 (+87.7%) on the year before, to £5,727.
- Current assets of £9,375 against £4,397 owed within a year: 2.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £5,727 | £9,375 | £4,397 | 2 | |
| 31 May 2024 | £3,051 | £6,875 | £3,824 | 2 |
Who runs and owns Crystalfix Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| I*** F*** | Director | Apr 2026 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| I*** F*** | Director | May 2023 | Apr 2026 |
Person with significant control
Where Crystalfix Ltd is registered
The registered office is in London (E1), in the Tower Hamlets local authority area, London. Show E1 0SG on a map.
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Shared registered office
367 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 Crystalfix 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 14837130
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2023 (3 years ago)
- Registered office
- 5 Brayford Square, London, E1 0SG
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 30 April 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- CS Building Services Consultants Limited2011
- CS Spatial Engineering Ltd2025
- Csa Builders Limited2025
- Csa Estates Ltd2017
- CSJ Homes (En3) Ltd2022
- CSJV CPL UK Swindon 1 Holdco Limited2024
- CSJV CPL UK Swindon 2 Holdco Limited2024
- CSJV CPL UK Swindon 3 Holdco Limited2024
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Crystalfix Ltd's accounts due?
Crystalfix Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Crystalfix Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Crystalfix Ltd still trading?
Crystalfix 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 Crystalfix Ltd do?
Crystalfix Ltd is registered under Development of building projects (SIC 41100).
How old is Crystalfix Ltd?
Crystalfix Ltd was incorporated on 1 May 2023, 3 years ago.
Who runs Crystalfix Ltd?
Crystalfix Ltd has 1 active director, the longest-serving appointed in Apr 2026. Their names and service addresses are on the Companies House register.
Who owns Crystalfix Ltd?
One person or company has significant control of Crystalfix Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Crystalfix 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 Crystalfix 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.