- Companies
- Electricians
- Londonderry
- Sean Brolly Electrical Ltd
Sean Brolly Electrical Ltd
- Company number
- NI701191
- Incorporated
- 1 Sep 20233 years trading
- Registered office
- 208 Tamnaherin Road, Cross, Londonderry, BT47 3HX
- Nature of business
- Electrical installation
Sean Brolly Electrical Ltd is a 3-year-old private limited company registered in Londonderry, company number NI701191, one of 48 electrical contractors in Londonderry. Companies House shows its accounts as overdue: they were due on 30 September 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Sean Brolly Electrical Ltd is registered
The registered office is in Londonderry (BT47), in the Derry City and Strabane local authority area, Northern Ireland. Show BT47 3HX on a map.
Other trade companies in BT47
- RNK Contracts LimitedGroundworks and demolition
- Den Electrical LtdElectricians
- BDK Consulting LimitedProperty developers
- Oakline Engineering LtdInstallers
- Killew Property Services LimitedFacilities management
- PH Autobody LimitedMechanics and garages
- C Doherty Autos LtdMechanics and garages
- CPMH LtdBuilders
Also registered at this address
1 other company uses the same registered office as Sean Brolly Electrical Ltd.
- MPB Plumbing LtdPlumbers and heating engineers
What happens if Sean Brolly Electrical Ltd files late
If the accounts reach Companies House today, the late filing penalty is £150 (£300 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2026 to 31 Oct 2026 | £150 |
| 1 to 3 months late | 1 Nov 2026 to 31 Dec 2026 | £375 |
| 3 to 6 months late | 1 Jan 2027 to 31 Mar 2027 | £750 |
| More than 6 months late | From 1 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2027 | 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
- NI701191
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 September 2023 (3 years ago)
- Registered office
- 208 Tamnaherin Road, Cross, Londonderry, BT47 3HX
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 29 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2024
- Last confirmation statement
- 31 August 2025
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 Londonderry
Other active electrical contractors registered in Londonderry.
- Select Electrical & Security Services Ltd2013
- SKD Electrical Limited2023
- Slevin Electrical Ltd2025
- Tark Electrical Ltd2021
- TMC Electrics Ltd2026
- Volt Electrical Installations Ltd2025
- Voltaic Energy Ltd2021
- Voltex Engineering Ltd2024
All electrical contractors in Londonderry · All trades in Londonderry · Electricians across the UK
Frequently asked questions
When are Sean Brolly Electrical Ltd's accounts due?
Sean Brolly Electrical Ltd's accounts were due at Companies House on 30 September 2026 and the register shows them as overdue.
When is Sean Brolly Electrical Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 September 2025, due by 30 September 2026, and one for the period to 31 December 2025, due by 31 December 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sean Brolly Electrical Ltd still trading?
Sean Brolly Electrical Ltd 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 Sean Brolly Electrical Ltd do?
Sean Brolly Electrical Ltd is registered under Electrical installation (SIC 43210).
How old is Sean Brolly Electrical Ltd?
Sean Brolly Electrical Ltd was incorporated on 1 September 2023, 3 years ago.
What is the penalty if Sean Brolly 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 Sean Brolly Electrical Ltd 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.