- Companies
- Property developers
- Swansea
- Castell Holdings Ltd
Castell Holdings Ltd
- Company number
- 13139256
- Incorporated
- 18 Jan 20215 years trading
- Registered office
- 5 Dyffryn Court Riverside Business Park, Swansea Vale, Swansea, SA7 0AP
- Nature of business
- Development of building projects
Castell Holdings Ltd is a 5-year-old private limited company registered in Swansea, company number 13139256, one of 273 property development companies in Swansea. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 down £3,244 (-86.7%) on the year before, to £499.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £316K against £317K owed within a year: 1.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £499 | £316K | £317K | 0 | |
| 31 Jan 2024 | £3,743 | £1,071 | £4,914 | 0 | |
| 31 Jan 2023 | £100 | ||||
| 31 Jan 2022 | £100 |
Where Castell Holdings Ltd is registered
The registered office is in Swansea (SA7), in the Swansea local authority area, Wales. Show SA7 0AP on a map.
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Also registered at this address
15 other companies use the same registered office as Castell Holdings Ltd.
- Barry Developments SPV 1 LtdProperty developers
- Caerphilly Developments SPV 1 LtdProperty developers
- Castell Construction LtdBuilders
- Castell Group LtdProperty developers
- Castell Land Holdings RCT SPV 1 LtdProperty developers
- Castell Land Holdings Swansea SPV 1 LtdProperty developers
- Coity Developments SPV 1 LtdProperty developers
- Neath Developments SPV 1 LtdProperty developers
- Pembrokeshire Developments SPV 1 LtdProperty developers
- Pontypridd Developments SPV 1 LtdProperty developers
- Port Talbot Developments SPV 1 LtdProperty developers
- Pyle Developments SPV LtdProperty developers
- Rhondda Developments SPV 1 LtdProperty developers
- Rhondda Developments SPV 2 LtdProperty developers
- Swansea Developments SPV 2 LtdBuilders
What happens if Castell Holdings 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13139256
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 January 2021 (5 years ago)
- Registered office
- 5 Dyffryn Court Riverside Business Park, Swansea Vale, Swansea, SA7 0AP
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 19 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 Swansea
Other active property development companies registered in Swansea.
- Castell Land Holdings RCT SPV 1 Ltd2023
- Castell Land Holdings Swansea SPV 1 Ltd2023
- Caterworld Limited1979
- CJ3 Ltd2020
- Classic Stove Installations Ltd2014
- Clearway Property and Management Services Limited2023
- CLM Groundworks Limited2005
- Clyndu Land Ltd2026
All property development companies in Swansea · All trades in Swansea · Property developers across the UK
Frequently asked questions
When are Castell Holdings Ltd's accounts due?
Castell Holdings Ltd's next accounts are due at Companies House by 31 October 2026 (in 17 days), covering the period to 31 January 2026.
When is Castell Holdings Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Castell Holdings Ltd still trading?
Castell Holdings 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 Castell Holdings Ltd do?
Castell Holdings Ltd is registered under Development of building projects (SIC 41100).
How old is Castell Holdings Ltd?
Castell Holdings Ltd was incorporated on 18 January 2021, 5 years ago.
What is the penalty if Castell Holdings 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 Castell Holdings 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.