- Companies
- Electricians
- Castle Cary
- Mainstones Electrical Limited
Mainstones Electrical Limited
- Company number
- 08279221
- Incorporated
- 2 Nov 201213 years trading
- Registered office
- The Offices, The Horsepond Courtyard, Castle Cary, Somerset, BA7 7BD
- Nature of business
- Electrical installation
Mainstones Electrical Limited is a 13-year-old private limited company registered in Castle Cary, company number 08279221, one of 5 electrical contractors in Castle Cary. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £27K (-452.5%) on the year before, to -£21K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £40K against £61K owed within a year: 0.6 times cover.
- 5 employees on average, up from 4 the year before.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | -£21K | £40K | £61K | 5 | |
| 29 Feb 2024 | £5,897 | £12K | £68K | £60K | 4 |
| 28 Feb 2023 | £15K | £9,139 | £73K | £55K | 4 |
| 28 Feb 2022 | -£19K | £1,989 | £47K | £61K | 5 |
| 28 Feb 2021 | -£37K | £39K | £68K | 4 |
Where Mainstones Electrical Limited is registered
The registered office is in Castle Cary (BA7), in the Somerset local authority area, South West. Show BA7 7BD on a map.
Other trade companies in BA7
- Mark Curtis Roofing and Building South West LtdBuilders
- Aviation Maintenance Group LtdMachinery repair and installation
- Tribal Auto LtdMotor traders
- H&J Motors LtdMotor traders
- Ribfix LtdMachinery repair and installation
- S W Building & Renovations LtdBuilders
- Nmjaero LtdMachinery repair and installation
- Room4UK LtdBuilders
Also registered at this address
8 other companies use the same registered office as Mainstones Electrical Limited.
- 21 Degrees C LimitedPlumbers and heating engineers
- Cary Motor Services LimitedMachinery repair and installation
- Controlled Climate LimitedInstallers
- Greenman Solutions LtdLandscapers and gardeners
- Hutchins Electrical Contractors LimitedElectricians
- Rob Trevis LimitedPlasterers
- S W Ollis LimitedMotor traders
- Somerton Windows LtdFinishing trades
What happens if Mainstones 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 08279221
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 November 2012 (13 years ago)
- Registered office
- The Offices, The Horsepond Courtyard, Castle Cary, Somerset, BA7 7BD
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 22 October 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 Castle Cary
Other active electrical contractors registered in Castle Cary.
- Arl Electrical Services Ltd2019
- Castle Electrical Services South West Ltd2016
- Chapel Heating Limited2003
- Hutchins Electrical Contractors Limited2015
All electrical contractors in Castle Cary · All trades in Castle Cary · Electricians across the UK
Frequently asked questions
When are Mainstones Electrical Limited's accounts due?
Mainstones Electrical Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Mainstones Electrical Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Mainstones Electrical Limited still trading?
Mainstones 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 Mainstones Electrical Limited do?
Mainstones Electrical Limited is registered under Electrical installation (SIC 43210).
How old is Mainstones Electrical Limited?
Mainstones Electrical Limited was incorporated on 2 November 2012, 13 years ago.
What is the penalty if Mainstones 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 Mainstones 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.