- Companies
- Specialist contractors
- Castlewellan
- Construction Sealants (Ireland) Ltd
Construction Sealants (Ireland) Ltd
- Company number
- NI636328
- Incorporated
- 9 Feb 201610 years trading
- Registered office
- 16 Upper Square, Castlewellan, County Down, BT31 9DD
- Nature of business
- Other specialised construction activities n.e.c.
Construction Sealants (Ireland) Ltd is a 10-year-old private limited company registered in Castlewellan, company number NI636328, one of 12 specialist construction companies in Castlewellan. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 2028.
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 £15K (-10.3%) on the year before, to £127K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £252K against £135K owed within a year: 1.9 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £127K | £252K | £135K | 0 | |
| 28 Feb 2025 | £141K | £298K | £170K | 0 | |
| 28 Feb 2024 | £100K | £249K | £154K | 2 | |
| 28 Feb 2023 | £106K | £217K | £118K | 0 | |
| 28 Feb 2022 | £123K | £184K | £68K | 2 | |
| 28 Feb 2021 | £138K | £220K | £97K | 3 | |
| 28 Feb 2020 | £178K | £224K | £65K | ||
| 28 Feb 2019 | £129K | £199K | £85K | 3 | |
| 28 Feb 2018 | £94K | £126K | £51K | ||
| 28 Feb 2017 | £79K | £176K | £108K |
Who runs and owns Construction Sealants (Ireland) Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| E*** S*** | Director | Feb 2016 |
| T*** S*** | Director | Feb 2016 |
People with significant control (2)
Where Construction Sealants (Ireland) Ltd is registered
The registered office is in Castlewellan (BT31), in the Newry, Mourne and Down local authority area, Northern Ireland. Show BT31 9DD on a map.
Other trade companies in BT31
- Ogm26 LtdGroundworks and demolition
- Treadline Tyre & Auto Services LtdMechanics and garages
- CB Fire Compliance LimitedSpecialist contractors
- Cea Joinery LtdJoiners and carpenters
- NI.CBR LtdMechanics and garages
- S.D.E Electrical Systems LtdElectricians
- Jam Civils & Utilities LtdGroundworks and demolition
- B McVeigh Mechanical LtdPlumbers and heating engineers
Also registered at this address
18 other companies use the same registered office as Construction Sealants (Ireland) Ltd.
- Agd Plumbing & Heating LtdPlumbers and heating engineers
- B R Building & Joinery LimitedFinishing trades
- Cea Joinery LtdJoiners and carpenters
- Cisco Plumbing & Heating LtdPlumbers and heating engineers
- Clonkeel Joinery LtdProperty developers
- CMC Surfacing & Groundwork LtdBuilders
- Echo Direct Construction LtdBuilders
- Jam Civils & Utilities LtdGroundworks and demolition
- Kelly New Homes LimitedBuilders
- KP Civil LtdGroundworks and demolition
- Mark Gallagher Building LtdBuilders
- Matthews Electrical Services (N.I.) LimitedElectricians
- MJD Building LtdBuilders
- Morgan Plumbing Services LtdPlumbers and heating engineers
- PDM Plumbing Services LtdPlumbers and heating engineers
- RW Carpentry & Construction LtdJoiners and carpenters
- S.D.E Electrical Systems LtdElectricians
- Seac Electrical LtdElectricians
What happens if Construction Sealants (Ireland) 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 30 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- NI636328
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 February 2016 (10 years ago)
- Registered office
- 16 Upper Square, Castlewellan, County Down, BT31 9DD
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 8 February 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 Castlewellan
Other active specialist construction companies registered in Castlewellan.
- D G McClean Ltd2025
- Dunlevy Contracts Limited2010
- MJ Oldbridge Developments Ltd2018
- PD Plant Hire Ltd2017
- R. McCabe Services Ltd2005
- Recon Stone Limited2014
- Rodgers Bros Ltd.2018
- Sawey Formwork Ltd2021
All specialist construction companies in Castlewellan · All trades in Castlewellan · Specialist contractors across the UK
Frequently asked questions
When are Construction Sealants (Ireland) Ltd's accounts due?
Construction Sealants (Ireland) Ltd's next accounts are due at Companies House by 30 November 2027 (in 413 days), covering the period to 28 February 2027.
When is Construction Sealants (Ireland) Ltd's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Construction Sealants (Ireland) Ltd still trading?
Construction Sealants (Ireland) 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 Construction Sealants (Ireland) Ltd do?
Construction Sealants (Ireland) Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Construction Sealants (Ireland) Ltd?
Construction Sealants (Ireland) Ltd was incorporated on 9 February 2016, 10 years ago.
Who runs Construction Sealants (Ireland) Ltd?
Construction Sealants (Ireland) Ltd has 2 active directors, the longest-serving appointed in Feb 2016. Their names and service addresses are on the Companies House register.
Who owns Construction Sealants (Ireland) Ltd?
2 people or companies have significant control of Construction Sealants (Ireland) Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Construction Sealants (Ireland) 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 Construction Sealants (Ireland) 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.