- Companies
- Installers
- Newcastle
- Costal Site Services Ltd
Costal Site Services Ltd
- Company number
- NI721933
- Incorporated
- 1 Oct 20242 years trading
- Registered office
- 29 Bryansford Road, Newcastle, Down, BT33 0HJ
- Nature of business
- Other construction installation; Combined facilities support activities; Fire service activities; Other service activities n.e.c.
Costal Site Services Ltd is a 2-year-old private limited company registered in Newcastle, company number NI721933, one of 19 installation companies (insulation, lifts, shutters and similar) in Newcastle. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 October 2025, as filed at Companies House.
Where Costal Site Services Ltd is registered
The registered office is in Newcastle (BT33), in the Newry, Mourne and Down local authority area, Northern Ireland. Show BT33 0HJ on a map.
Other trade companies in BT33
- Tollymore Construction LtdBuilders
- East Coast Cooling LtdPlumbers and heating engineers
- Web Assets LtdCleaning companies
- Altnadue Mechanical Services LtdPlumbers and heating engineers
- Mourne Fire & Electrical LtdElectricians
- DMK Design and Build LtdBuilders
- Hawkins Electrical Contracts LtdElectricians
- C H P Mechanical (NI) LtdPlumbers and heating engineers
What happens if Costal Site Services 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- NI721933
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 October 2024 (2 years ago)
- Registered office
- 29 Bryansford Road, Newcastle, Down, BT33 0HJ
- Nature of business
- Other construction installation (SIC 43290)
Combined facilities support activities (SIC 81100)
Fire service activities (SIC 84250)
Other service activities n.e.c. (SIC 96090) - Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 30 September 2025
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Newcastle
Other active installation companies (insulation, lifts, shutters and similar) registered in Newcastle.
- E J Lundy & Co Ltd2013
- Fresh Start Bathrooms Ltd2025
- G Swindells Brickwork Ltd2022
- GMW Property (Staffs) Ltd2025
- Grand Pa Ltd2022
- GRC Retail Solutions Limited2002
- Group2U Ltd2024
- JSK Construction Group Ltd2023
All installation companies (insulation, lifts, shutters and similar) in Newcastle · All trades in Newcastle · Installers across the UK
Frequently asked questions
When are Costal Site Services Ltd's accounts due?
Costal Site Services Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Costal Site Services Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Costal Site Services Ltd still trading?
Costal Site Services 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 Costal Site Services Ltd do?
Costal Site Services Ltd is registered under Other construction installation (SIC 43290); Combined facilities support activities (SIC 81100); Fire service activities (SIC 84250); Other service activities n.e.c. (SIC 96090).
How old is Costal Site Services Ltd?
Costal Site Services Ltd was incorporated on 1 October 2024, 2 years ago.
What is the penalty if Costal Site Services 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 Costal Site Services 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.