- Companies
- Electricians
- Hebburn
- Castle Building Services (South) Limited
Castle Building Services (South) Limited
- Company number
- 10400990
- Incorporated
- 29 Sep 201610 years trading
- Registered office
- 6 Merchant Court Monkton Business Park South, Hebburn, Tyne and Wear, NE31 2EX
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation
Castle Building Services (South) Limited is a 10-year-old private limited company registered in Hebburn, company number 10400990, one of 13 electrical contractors in Hebburn. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Castle Building Services (South) Limited is registered
The registered office is in Hebburn (NE31), in the South Tyneside local authority area, North East. Show NE31 2EX on a map.
Other trade companies in NE31
- Milburns Roofing & Cladding LtdRoofers
- Mains Rope and Rescue LtdCleaning companies
- Girls Just Clean and Have Fun LtdCleaning companies
- Sinclair Building Solutions LtdBuilders
- Sean Bowman Services LtdBuilders
- C Camps Heating Services LimitedPlumbers and heating engineers
- Apollo Regeneration Partnership LimitedProperty developers
- Castle (Ne) Homes LimitedBuilders
What happens if Castle Building Services (South) 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 10400990
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 2016 (10 years ago)
- Registered office
- 6 Merchant Court Monkton Business Park South, Hebburn, Tyne and Wear, NE31 2EX
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 28 September 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Hebburn
Other active electrical contractors registered in Hebburn.
- CN Power Solutions Ltd2025
- Coyne Interiors Ltd2004
- CS Electrical (Ne) Limited2026
- Eeslc Ltd2025
- JW Steele Electrical Services Limited2017
- KM & Sons Electrical Ltd2022
- NJP Electrical Solutions Ltd2025
- Robinson’S Electrical Solutions Ltd2025
All electrical contractors in Hebburn · All trades in Hebburn · Electricians across the UK
Frequently asked questions
When are Castle Building Services (South) Limited's accounts due?
Castle Building Services (South) Limited's next accounts are due at Companies House by 30 September 2027 (in 351 days), covering the period to 31 December 2026.
When is Castle Building Services (South) Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Castle Building Services (South) Limited still trading?
Castle Building Services (South) Limited is listed as active on the Companies House register (checked 13 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 Building Services (South) Limited do?
Castle Building Services (South) Limited is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Castle Building Services (South) Limited?
Castle Building Services (South) Limited was incorporated on 29 September 2016, 10 years ago.
What is the penalty if Castle Building Services (South) 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 Building Services (South) Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.