- Companies
- Specialist contractors
- Swansea
- Castle Graig Limited
Castle Graig Limited
- Company number
- 13873331
- Incorporated
- 26 Jan 20224 years trading
- Registered office
- Penycwar New Quarr Road, Treboeth, Swansea, SA5 9DH
- Nature of business
- Other specialised construction activities n.e.c.
Castle Graig Limited is a 4-year-old private limited company registered in Swansea, company number 13873331, one of 99 specialist construction companies in Swansea. Its next accounts are due at Companies House on 29 October 2026, and the CT600 for the period to 29 January 2026 is due at HMRC on 29 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the 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 Castle Graig LimitedOr 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.
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 £37K (-166.7%) on the year before, to -£59K.
- Current assets of £7,734 against £73K owed within a year: 0.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | -£59K | £7,734 | £73K | 0 | |
| 31 Jan 2024 | -£22K | £14K | £38K | 2 | |
| 31 Jan 2023 | -£5,393 | £25K | £31K | 2 |
Where Castle Graig Limited is registered
The registered office is in Swansea (SA5), in the Swansea local authority area, Wales. Show SA5 9DH on a map.
Other trade companies in SA5
- Lee.T73 Rail LtdCivil engineering
- LJ Cleaning Swansea LimitedCleaning companies
- Same Day Roof Repairs Swansea LtdRoofers
- Warlow&Co LimitedProperty developers
- RNJ Vehicle Repairs LtdMechanics and garages
- Erj's Recovery and Transportation LtdMotor traders
- Brandrick Group LimitedElectricians
- Chris Chambers Holdings LimitedElectricians
What happens if Castle Graig Limited 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 29 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Oct 2026 to 29 Nov 2026 | £150 |
| 1 to 3 months late | 30 Nov 2026 to 29 Jan 2027 | £375 |
| 3 to 6 months late | 30 Jan 2027 to 29 Apr 2027 | £750 |
| More than 6 months late | From 30 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Jan 2027 | £200 |
| 3 months late | 29 Apr 2027 | another £200 |
| 6 months late | 29 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 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
- 13873331
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 January 2022 (4 years ago)
- Registered office
- Penycwar New Quarr Road, Treboeth, Swansea, SA5 9DH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 29 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 25 January 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Swansea
Other active specialist construction companies registered in Swansea.
- Caswell Interiors Limited2008
- Celtic Valley Eco Solutions Ltd2026
- Ceri Hall Construction Ltd2009
- Coast Carpentry and Renovations Limited2021
- Colin Bowen Water Services Ltd2012
- Construction Repairs Limited2010
- Coombs Land Surveys Ltd2023
- Copper Coast Ltd2021
All specialist construction companies in Swansea · All trades in Swansea · Specialist contractors across the UK
Frequently asked questions
When are Castle Graig Limited's accounts due?
Castle Graig Limited's next accounts are due at Companies House by 29 October 2026 (in 17 days), covering the period to 29 January 2026.
When is Castle Graig Limited's CT600 due?
The CT600 for the period to 29 January 2026 is due at HMRC by 29 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 October 2026.
Is Castle Graig Limited still trading?
Castle Graig Limited 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 Castle Graig Limited do?
Castle Graig Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Castle Graig Limited?
Castle Graig Limited was incorporated on 26 January 2022, 4 years ago.
What is the penalty if Castle Graig Limited 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 Castle Graig Limited 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.