- Companies
- Electricians
- Castlewellan
- Seac Electrical Ltd
Seac Electrical Ltd
- Company number
- NI653141
- Incorporated
- 18 May 20188 years trading
- Registered office
- 16 Upper Square, Castlewellan, BT31 9DD
- Nature of business
- Electrical installation
Seac Electrical Ltd is a 8-year-old private limited company registered in Castlewellan, company number NI653141, one of 10 electrical contractors in Castlewellan. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 up £17K (+282.2%) on the year before, to £23K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £37K against £12K owed within a year: 3.0 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £23K | £37K | £12K | 2 | |
| 31 May 2024 | £5,998 | £18K | £11K | 1 | |
| 31 May 2023 | £962 | £10K | £8,014 | 1 | |
| 31 May 2022 | £5,300 | £20K | £13K | 1 | |
| 31 May 2021 | £28K | £42K | £12K | 1 | |
| 31 May 2020 | £11K | £20K | £7,810 | 0 | |
| 31 May 2019 | £5,942 | £10K | £3,513 | 2 |
Where Seac Electrical 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 Seac Electrical 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
- Construction Sealants (Ireland) LtdSpecialist contractors
- 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
What happens if Seac Electrical 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- NI653141
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 May 2018 (8 years ago)
- Registered office
- 16 Upper Square, Castlewellan, BT31 9DD
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 17 May 2026
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 Castlewellan
Other active electrical contractors registered in Castlewellan.
- Epic Electrical Services Limited2020
- JC Electrics (NI) Limited2012
- JMC Connect Ltd2022
- JMC Electrics Holdings Ltd2026
- Matthews Electrical Services (N.I.) Limited2016
- RPG Electrics Ltd2024
- Rycon Electrical Ltd2022
- S.D.E Electrical Systems Ltd2026
All electrical contractors in Castlewellan · All trades in Castlewellan · Electricians across the UK
Frequently asked questions
When are Seac Electrical Ltd's accounts due?
Seac Electrical Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Seac Electrical Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Seac Electrical Ltd still trading?
Seac Electrical 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 Seac Electrical Ltd do?
Seac Electrical Ltd is registered under Electrical installation (SIC 43210).
How old is Seac Electrical Ltd?
Seac Electrical Ltd was incorporated on 18 May 2018, 8 years ago.
What is the penalty if Seac Electrical 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 Seac Electrical 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.