- Company number
- 16874603
- Incorporated
- 25 Nov 2025
- Registered office
- 282, Solar House, Chase Road, London, N14 6NZ
- Nature of business
- Construction of domestic buildings; Other building completion and finishing; Other specialised construction activities n.e.c.; Buying and selling of own real estate
Alpha Xi Ltd is a newly incorporated private limited company registered in London, company number 16874603, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 25 August 2027, and its first CT600 is due at HMRC on 24 November 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Alpha Xi Ltd is registered
The registered office is in London (N14), in the Enfield local authority area, London. Show N14 6NZ on a map.
Other trade companies in N14
- S & N Construction LtdBuilders
- Ekia Solutions LtdElectricians
- S&N Finishes LtdBuilders
- Soley London Group LtdElectricians
- Interior Build 1 LtdFinishing trades
- Niclons Engineering and Management LtdFinishing trades
- Kevlar Heating LimitedPlumbers and heating engineers
- Neonova Investments LtdProperty developers
Also registered at this address
1 other company uses the same registered office as Alpha Xi Ltd.
- Ax Management LimitedBuilders
What happens if Alpha Xi 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 25 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 Aug 2027 to 25 Sep 2027 | £150 |
| 1 to 3 months late | 26 Sep 2027 to 25 Nov 2027 | £375 |
| 3 to 6 months late | 26 Nov 2027 to 25 Feb 2028 | £750 |
| More than 6 months late | From 26 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16874603
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2025
- Registered office
- 282, Solar House, Chase Road, London, N14 6NZ
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other building completion and finishing (SIC 43390)
Other specialised construction activities n.e.c. (SIC 43999)
Buying and selling of own real estate (SIC 68100) - Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- Alphacontractinggroup Ltd2026
- Alphion Group Ltd2025
- Alroubaei Building Services Ltd2019
- Alsager Quantum Ltd2022
- Alt Group Construction Ltd2019
- Alt Steel Ltd2026
- Altair Building Limited2004
- Altam Construction Ltd2023
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Alpha Xi Ltd's accounts due?
Alpha Xi Ltd's next accounts are due at Companies House by 25 August 2027 (in 316 days), covering the period to 30 November 2026.
When is Alpha Xi Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 24 November 2026, due by 24 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Alpha Xi Ltd still trading?
Alpha Xi 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 Alpha Xi Ltd do?
Alpha Xi Ltd is registered under Construction of domestic buildings (SIC 41202); Other building completion and finishing (SIC 43390); Other specialised construction activities n.e.c. (SIC 43999); Buying and selling of own real estate (SIC 68100).
How old is Alpha Xi Ltd?
Alpha Xi Ltd was incorporated on 25 November 2025, less than a year ago.
What is the penalty if Alpha Xi 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 Alpha Xi 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.