CRYSTAL SIGMA LTD
Active Company number 04902311
CRYSTAL SIGMA LTD (company number 04902311) is a private limited company incorporated on 17 September 2003. Its status on the Companies House register is Active. Its registered office is in NW2 7AY. Its nature of business (SIC 2007) is plumbing, heat and air-conditioning installation (43220). Its latest accounts we hold, for the period ending 31 March 2025, report net assets of £225k.
Source: Companies House register, as at 2 October 2026. How to cite this page
Information only, not advice. Register details and accounts figures are the company's own filings, shown as filed: CompanyStack does not audit or verify them and accepts no responsibility for decisions made on them. Check important facts at Companies House.
Company Report on CRYSTAL SIGMA LTD (PDF)
The register, the accounts and the people behind the company in one PDF, for your own business use.
- Summary and Health Score: with the reasons behind the score
- Red flags: and what changed in the last 12 months
- Key figures: the accounts to 31 Mar 2025 against the year before
- Filing deadlines: accounts due 31 Dec 2026; confirmation statement due 1 Oct 2027
- Financials ledger: 10 years of filed accounts held (2016–2025)
- Who runs and owns it: 1 PSC
- Shareholders: the current register from the filings: each holder, class, shares and percentage
- Charges: 2 outstanding of 2 charges registered
- Filing history and methodology: with sources and a disclaimer
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Company details
- Company number
- 04902311
- Status
- Active
- Company type
- Private Limited Company
- Incorporated
- 17 September 2003
- Country of origin
- United Kingdom
- Registered office
- 657 NORTH CIRCULAR ROAD
LONDON
NW2 7AY
Nature of business (SIC 2007)
Accounts and confirmation statement
- Accounting reference date
- 31 March
- Accounts category
- TOTAL EXEMPTION FULL
- Accounts last made up to
- 31 March 2025
- Next accounts due
- 31 December 2026
- Confirmation statement last made up to
- 17 September 2026
- Next confirmation statement due
- 1 October 2027
Financial summary
| Period ending | 31 March 2025 | 31 March 2024 | 31 March 2023 | 31 March 2022 | 31 March 2021 | 31 March 2020 | 31 March 2019 | 31 March 2018 | 31 March 2017 | 31 March 2016 |
|---|---|---|---|---|---|---|---|---|---|---|
| Total assets | — | — | — | £1.3m | £1.2m | £1.1m | £949k | £860k | £593k | £436k |
| Cash at bank | £327k | £104k | £88k | £171k | £97k | £219k | £142k | £117k | £422k | £266k |
| Current liabilities | £1.2m | £779k | £660k | £779k | £806k | £786k | £780k | £806k | £586k | £405k |
| Net current assets / (liabilities) | — | — | — | £550k | £360k | £284k | £134k | £11k | (£1,531) | £29k |
| Total liabilities | — | — | — | — | — | — | £782k | £808k | £587k | £405k |
| Net assets | £225k | £257k | £268k | £258k | £249k | £302k | £167k | £52k | £5,914 | £31k |
| Employees | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 16 | 27 | 23 |
—: no figure read from the filing.
Figures read from filings at Companies House (ixbrl) and checked; see how we read them. Small-company accounts often omit turnover and profit. Spotted an error? Tell us.
Control, officers and charges
- Persons with significant control
- 1 current (2 including ceased)
- Corporate controllers
- Riaz & Sons Holding Ltd
- Charges (mortgages)
- 2 registered, 2 outstanding, 0 satisfied
Previous names
- C & R CRYSTAL AIR CONDITIONING LTD (changed 30 September 2008)
Questions about CRYSTAL SIGMA LTD
Is CRYSTAL SIGMA LTD active?
Yes. The Companies House register shows the company's status as “Active”. (Companies House register, as at 2 October 2026.)
When was CRYSTAL SIGMA LTD incorporated?
CRYSTAL SIGMA LTD was incorporated on 17 September 2003, according to the Companies House register. (Companies House register, as at 2 October 2026.)
Where is CRYSTAL SIGMA LTD registered?
Its registered office is in NW2 7AY. (Companies House register, as at 2 October 2026.)
Who controls CRYSTAL SIGMA LTD?
The register lists 1 current person with significant control (2 including those who have ceased). Corporate controllers named on the register: Riaz & Sons Holding Ltd. The register shows control, not a list of shareholders. Individuals are named at https://find-and-update.company-information.service.gov.uk/company/04902311/persons-with-significant-control. (Companies House register, as at 2 October 2026.) Who owns a UK limited company: shareholders, PSCs and what the register shows
When are CRYSTAL SIGMA LTD's next accounts due?
The register shows the next accounts as due by 31 December 2026. Its latest accounts on the register were made up to 31 March 2025. (Companies House register, as at 2 October 2026.)
Does CRYSTAL SIGMA LTD file dormant accounts?
Not in its latest accounts. The register gives their category as “Total exemption accounts”, made up to 31 March 2025. (Companies House register, as at 2 October 2026.) What a dormant company is and what it must file
Does CRYSTAL SIGMA LTD have any charges registered against it?
Yes. The register shows 2 charges: 2 outstanding and 0 satisfied. The charges themselves are listed at https://find-and-update.company-information.service.gov.uk/company/04902311/charges. (Companies House register, as at 2 October 2026.) Company charges: what a mortgage or debenture means and how to read one
Is CRYSTAL SIGMA LTD on a sanctions list?
No match for this company's name on the sanctions lists CompanyStack screens (UK, EU, OFAC SDN, OFAC non-SDN, Canada, Australia, New Zealand, Japan, France, US CSL) as at 9 October 2026. A name screen is not legal clearance.
Related companies
More plumbing, heat and air-conditioning installation companies
- CUBICO (UK) LIMITED
- BORTHWICK HEATING INSULATION UK LTD
- A. & B. ENGINEERING (MECHANICAL SERVICE DIVISION) LIMITED
- WOODFORD HEATING & ENERGY LIMITED
- VERTEX SERVICES GROUP LIMITED
- PIMLICO PLUMBERS LIMITED
- OAKRAY LIMITED
- BERKS INSULATION LIMITED
Industry overview: 42,165 active companies in SIC 43220
Other active companies registered at NW2 7AY
Related guides
About CompanyStack
CompanyStack turns Companies House records into answers you can act on: who a company is, who runs and owns it, whether it keeps up with its filings and how its finances are moving. Every figure traces back to a public record, and we say when a record is missing.
Sources for company pages: Companies House (register, accounts, officers, PSCs, charges and filings), The Gazette (company insolvency notices only), the ONS Postcode Directory, official sanctions lists, including those of the UK (with UN designations), the EU, the US, Canada, Australia, New Zealand and France, and copies taken in April 2026 of the ICO register, the Charity Commission, CQC, Ofsted, Food Standards Agency and Environment Agency registers. Contains public sector information licensed under the Open Government Licence v3.0. CompanyStack is not affiliated with or endorsed by Companies House.
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Use this data
Official register entry: CRYSTAL SIGMA LTD on Companies House.
Developers can fetch this profile as JSON with GET https://api.companystack.co.uk/company/04902311 — see the API documentation and pricing.