- Companies
- Civil engineering
- Blackwood
- Railzone Ltd
Railzone Ltd
- Company number
- 16874614
- Incorporated
- 25 Nov 2025
- Registered office
- 56 Ffordd Cae'r Ywen, Cwmgelli, Blackwood, NP12 1FX
- Nature of business
- Construction of railways and underground railways
Railzone Ltd is a newly incorporated private limited company registered in Blackwood, company number 16874614, one of 8 civil engineering contractors in Blackwood. 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.
Is this your company?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Railzone LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Railzone Ltd is registered
The registered office is in Blackwood (NP12), in the Caerphilly local authority area, Wales. Show NP12 1FX on a map.
Other trade companies in NP12
- Hohm Property Group LtdProperty developers
- R&C Mechanics LimitedMechanics and garages
- M & R Property Solutions (SW) LimitedFinishing trades
- JLH Scaffolding LtdScaffolders
- SM Contracting SW LtdBuilders
- Top Notch Carpentry Services LimitedInstallers
- Cardiff Bathrooms LtdFinishing trades
- CB Brickwork & Building LtdSpecialist contractors
What happens if Railzone 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
- 16874614
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2025
- Registered office
- 56 Ffordd Cae'r Ywen, Cwmgelli, Blackwood, NP12 1FX
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Blackwood
Other active civil engineering contractors registered in Blackwood.
- Trydan Rail Ltd2023
- D & M Groundworks & Utilities Ltd2017
- Dark & Hillman Construction Ltd2003
- Elite Jointing Solutions Limited2024
- John Dunn Brickwork Contractors Ltd2009
- LCS Engineering Ltd2009
- LV Plant Ltd2026
All civil engineering contractors in Blackwood · All trades in Blackwood · Civil engineering across the UK
Frequently asked questions
When are Railzone Ltd's accounts due?
Railzone 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 Railzone 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 Railzone Ltd still trading?
Railzone 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 Railzone Ltd do?
Railzone Ltd is registered under Construction of railways and underground railways (SIC 42120).
How old is Railzone Ltd?
Railzone Ltd was incorporated on 25 November 2025, less than a year ago.
What is the penalty if Railzone 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 Railzone 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.