- Company number
- NI674611
- Incorporated
- 30 Nov 20205 years trading
- Registered office
- 50 Manse Road, Kilkeel, Newry, Co. Down, BT34 4BN
- Nature of business
- Construction of domestic buildings
Seamount Developments Limited is a 5-year-old private limited company registered in Newry, company number NI674611, one of 309 building contractors in Newry. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £4,787 (-3%) on the year before, to £155K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £513K against £358K owed within a year: 1.4 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £155K | £513K | £358K | 2 | |
| 31 Aug 2024 | £159K | £198K | £40K | 2 | |
| 31 Aug 2023 | £122K | £549K | £65K | 0 | |
| 31 Aug 2022 | £62K | £113K | £42K | 0 | |
| 31 Aug 2021 | -£2,047 | £54K | £4,991 | 0 |
Who runs and owns Seamount Developments Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| K*** E*** | Director | Nov 2020 |
| R*** E*** | Director | Nov 2020 |
People with significant control (2)
Where Seamount Developments Limited is registered
The registered office is in Newry (BT34), in the Newry, Mourne and Down local authority area, Northern Ireland. Show BT34 4BN on a map.
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Also registered at this address
1 other company uses the same registered office as Seamount Developments Limited.
- W E Elliott & Son LimitedPlumbers and heating engineers
What happens if Seamount Developments 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- NI674611
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 November 2020 (5 years ago)
- Registered office
- 50 Manse Road, Kilkeel, Newry, Co. Down, BT34 4BN
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 29 November 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Newry
Other active building contractors registered in Newry.
- SFD Contracts Ltd2025
- Sherry & O'Hare Ltd2004
- Shields Bricklaying Ltd2017
- Silcon Contracts Ltd2025
- SJR Developments Ltd2014
- SJS Bricklaying Ltd2025
- Slaterock Structural Engineering Limited2010
- SMC Brickworks Ltd2022
All building contractors in Newry · All trades in Newry · Builders across the UK
Frequently asked questions
When are Seamount Developments Limited's accounts due?
Seamount Developments Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Seamount Developments Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Seamount Developments Limited still trading?
Seamount Developments 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 Seamount Developments Limited do?
Seamount Developments Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Seamount Developments Limited?
Seamount Developments Limited was incorporated on 30 November 2020, 5 years ago.
Who runs Seamount Developments Limited?
Seamount Developments Limited has 2 active directors, the longest-serving appointed in Nov 2020. Their names and service addresses are on the Companies House register.
Who owns Seamount Developments Limited?
2 people or companies have significant control of Seamount Developments Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Seamount Developments 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 Seamount Developments 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.