- Companies
- Civil engineering
- Watford
- Thunder Electrical Services Ltd
Thunder Electrical Services Ltd
- Company number
- 10366646
- Incorporated
- 8 Sep 201610 years trading
- Registered office
- Flat 16 Hurst Court, Elliot Road, Watford, WD17 4DF
- Nature of business
- Construction of utility projects for electricity and telecommunications; Electrical installation; Other construction installation; Repair of consumer electronics
Thunder Electrical Services Ltd is a 10-year-old private limited company registered in Watford, company number 10366646, one of 77 civil engineering contractors in Watford. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £2,225 (-33.1%) on the year before, to £4,492.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £8,500 against £4,667 owed within a year: 1.8 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £4,492 | £8,500 | £4,667 | 2 | |
| 30 Sep 2024 | £6,717 | £12K | £6,382 | 2 | |
| 30 Sep 2023 | £3,844 | £15K | £12K | 2 | |
| 30 Sep 2022 | £15K | £15K | £1,156 | 1 | |
| 30 Sep 2021 | £12K | £11K | £376 | 1 | |
| 30 Sep 2020 | £45 | £13K | £15K | 1 | |
| 30 Sep 2019 | £2,513 | £17K | £17K | 1 | |
| 30 Sep 2018 | £358 | £2,500 | |||
| 30 Sep 2017 | £8,925 | £21K |
Where Thunder Electrical Services Ltd is registered
The registered office is in Watford (WD17), in the Watford local authority area, East of England. Show WD17 4DF on a map.
Other trade companies in WD17
- Ramauto LimitedMotor traders
- A1 Motors Watford LtdMechanics and garages
- Kola Brickwork LtdInstallers
- Appleby's Mechanical Services LtdPlumbers and heating engineers
- Kpu Services LtdProperty developers
- Highmark Investments LtdBuilders
- Boriama Private Office LimitedCleaning companies
- Oldsy Install LtdInstallers
What happens if Thunder Electrical 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 10366646
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 September 2016 (10 years ago)
- Registered office
- Flat 16 Hurst Court, Elliot Road, Watford, WD17 4DF
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
Electrical installation (SIC 43210)
Other construction installation (SIC 43290)
Repair of consumer electronics (SIC 95210) - Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 7 September 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Watford
Other active civil engineering contractors registered in Watford.
- Tilemotor Limited2000
- TPHR Rail Ltd2022
- Triangle Engineering Lincoln Ltd2017
- Unifound Limited2021
- Valentine Rail Limited2014
- Watford Safety & Constructions Services Ltd2025
- Willaw Surveys Ltd2014
- Zero Floarea Ltd2025
All civil engineering contractors in Watford · All trades in Watford · Civil engineering across the UK
Frequently asked questions
When are Thunder Electrical Services Ltd's accounts due?
Thunder Electrical Services Ltd's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Thunder Electrical Services Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Thunder Electrical Services Ltd still trading?
Thunder Electrical 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 Thunder Electrical Services Ltd do?
Thunder Electrical Services Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220); Electrical installation (SIC 43210); Other construction installation (SIC 43290); Repair of consumer electronics (SIC 95210).
How old is Thunder Electrical Services Ltd?
Thunder Electrical Services Ltd was incorporated on 8 September 2016, 10 years ago.
What is the penalty if Thunder Electrical 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 Thunder Electrical 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.