- Companies
- Electricians
- Chelmsford
- K.J. Sinnott Electrical Limited
K.J. Sinnott Electrical Limited
- Company number
- 03346525
- Incorporated
- 7 Apr 199729 years trading
- Registered office
- 126 Celeborn Street, South Woodham Ferrers, Chelmsford, Essex, CM3 7AW
- Nature of business
- Electrical installation
K.J. Sinnott Electrical Limited is a 29-year-old private limited company registered in Chelmsford, company number 03346525, one of 160 electrical contractors in Chelmsford. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 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 £56K (-4.4%) on the year before, to £1.2M.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £1.2M against £4,251 owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £1.2M | £152K | £1.2M | £4,251 | 0 |
| 31 Mar 2025 | £1.3M | £436K | £1.3M | £2,057 | 0 |
| 31 Mar 2024 | £1.3M | £246K | £1.3M | £3,887 | 0 |
| 31 Mar 2023 | £1.5M | £96K | £1.5M | £7,388 | 3 |
| 30 Sep 2021 | £1.6M | £265K | £1.7M | £108K | 3 |
| 30 Sep 2020 | £1.3M | £289K | £1.4M | £35K | 3 |
| 30 Sep 2019 | £1.3M | £436K | £1.4M | £85K | 3 |
| 30 Sep 2018 | £1.2M | £446K | £1.3M | £134K | 3 |
| 30 Sep 2017 | £933K | £499K | £1.1M | £131K | 3 |
| 30 Sep 2016 | £817K | £629K | £929K |
Where K.J. Sinnott Electrical Limited is registered
The registered office is in Chelmsford (CM3), in the Chelmsford local authority area, East of England. Show CM3 7AW on a map.
Other trade companies in CM3
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- Proglaze Window & Door Fitters LtdGlaziers
- Wrenford Holdings LtdProperty developers
- Pinnacle Performance and Prestige LimitedMotor traders
- Corevent Fire Safety LtdElectricians
- Eaton Home Improvements and Development LtdSpecialist contractors
- Saunders Electrical LtdElectricians
- Ashcroft Vehicles LtdMotor traders
What happens if K.J. Sinnott Electrical 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 03346525
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 April 1997 (29 years ago)
- Registered office
- 126 Celeborn Street, South Woodham Ferrers, Chelmsford, Essex, CM3 7AW
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 7 April 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 Chelmsford
Other active electrical contractors registered in Chelmsford.
- Kelsey Electrical Limited2014
- King Electrical and Maintenance Services Limited2024
- KJS Electrical Contractors Limited2016
- KRK Electrical Ltd2025
- Kse Services Limited1998
- L&R Renewables Ltd2021
- Lake Electrical Services Limited2019
- Landlord's Safety Certificates (Eicr) Ltd2025
All electrical contractors in Chelmsford · All trades in Chelmsford · Electricians across the UK
Frequently asked questions
When are K.J. Sinnott Electrical Limited's accounts due?
K.J. Sinnott Electrical Limited's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is K.J. Sinnott Electrical Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is K.J. Sinnott Electrical Limited still trading?
K.J. Sinnott Electrical 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 K.J. Sinnott Electrical Limited do?
K.J. Sinnott Electrical Limited is registered under Electrical installation (SIC 43210).
How old is K.J. Sinnott Electrical Limited?
K.J. Sinnott Electrical Limited was incorporated on 7 April 1997, 29 years ago.
What is the penalty if K.J. Sinnott Electrical 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 K.J. Sinnott Electrical 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.