- Companies
- Electricians
- Isleworth
- C B Electrical & Mechanical Services Ltd
C B Electrical & Mechanical Services Ltd
- Company number
- 08299090
- Incorporated
- 19 Nov 201213 years trading
- Registered office
- Isleworth Business Complex, ST. Johns Road, Isleworth, TW7 6NL
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other construction installation
C B Electrical & Mechanical Services Ltd is a 13-year-old private limited company registered in Isleworth, company number 08299090, one of 26 electrical contractors in Isleworth. Its next accounts are due at Companies House on 30 November 2026, and its first CT600 is due at HMRC on 30 November 2026.
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 £188K (+12.9%) on the year before, to £1.6M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2.2M against £712K owed within a year: 3.0 times cover.
- 15 employees on average, up from 11 the year before.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £1.6M | £320K | £2.2M | £712K | 15 |
| 30 Nov 2023 | £1.5M | £3,991 | £2.8M | £1.5M | 11 |
| 30 Nov 2022 | £581K | £13K | £596K | £174K | 10 |
| 30 Nov 2021 | £846K | £346K | £1.2M | £485K | 9 |
| 30 Nov 2020 | £448K | £208K | £923K | £562K | 9 |
| 30 Nov 2019 | £192K | £50K | £593K | £434K | 9 |
| 30 Nov 2018 | £164K | £228K | £847K | £713K | |
| 30 Nov 2017 | £100K | £58K | £455K | £378K | |
| 30 Nov 2016 | £84K | £100 | £351K | £287K | |
| 30 Nov 2015 | £52K | £100 | £285K | £256K |
Public contracts won
C B Electrical & Mechanical Services Ltd has one public sector contract award on record (2025). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| London & Quadrant Housing Trust | award | Ceiling, not shown | 3 Nov 2025 |
Where C B Electrical & Mechanical Services Ltd is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 6NL on a map.
Other trade companies in TW7
- Pracom LtdMachinery repair and installation
- V&R Construction Group LtdBuilders
- Gio Construction LimitedBuilders
- S & H Bodywork LtdMechanics and garages
- KS Garage Isleworth LtdMotor traders
- C Wiseman Services LtdCleaning companies
- Avenida Developments LtdProperty developers
- Courtesy Cars Group UK LtdMotor traders
What happens if C B Electrical & Mechanical 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 08299090
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 November 2012 (13 years ago)
- Registered office
- Isleworth Business Complex, ST. Johns Road, Isleworth, TW7 6NL
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 19 November 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Isleworth
Other active electrical contractors registered in Isleworth.
- City Electrical Limited2016
- DB Services (Greenford) Ltd2002
- Eeo FM Ltd2022
- Electrical Service Team Ltd2023
- Invent+ Ltd2014
- Irt Electrical Services Limited2025
- James Electrical Services Ltd2023
- Jeh Electricians Ltd2019
All electrical contractors in Isleworth · All trades in Isleworth · Electricians across the UK
Frequently asked questions
When are C B Electrical & Mechanical Services Ltd's accounts due?
C B Electrical & Mechanical Services Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is C B Electrical & Mechanical Services 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 November 2025, due by 30 November 2026, and one for the period to 28 February 2026, due by 28 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is C B Electrical & Mechanical Services Ltd still trading?
C B Electrical & Mechanical 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 C B Electrical & Mechanical Services Ltd do?
C B Electrical & Mechanical Services Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290).
How old is C B Electrical & Mechanical Services Ltd?
C B Electrical & Mechanical Services Ltd was incorporated on 19 November 2012, 13 years ago.
Has C B Electrical & Mechanical Services Ltd won public sector contracts?
Yes. C B Electrical & Mechanical Services Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from LONDON & QUADRANT HOUSING TRUST.
What is the penalty if C B Electrical & Mechanical 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 C B Electrical & Mechanical 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.