- Companies
- Civil engineering
- London
- First Fix Electrical Ltd
First Fix Electrical Ltd
- Company number
- 12536028
- Incorporated
- 26 Mar 20206 years trading
- Registered office
- Unit Da2 Sutherland House, 43 Sutherland Road, London, E17 6BU
- Nature of business
- Construction of utility projects for electricity and telecommunications; Electrical installation; Engineering related scientific and technical consulting activities; Security systems service activities
First Fix Electrical Ltd is a 6-year-old private limited company registered in London, company number 12536028, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 up £101 (+70.1%) on the year before, to £245.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £12K against £13K owed within a year: 0.9 times cover.
- 1 employee on average during the year.
- 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £245 | £12K | £13K | 1 | |
| 29 Feb 2024 | £144 | £7,331 | £8,722 | 1 | |
| 28 Feb 2023 | £102 | £173 | £1,943 | 1 | |
| 28 Feb 2022 | £155 | £2,123 | £1,968 | 1 | |
| 28 Feb 2021 | £159 | £1,742 | £2,482 | £2,323 | 1 |
Where First Fix Electrical Ltd is registered
The registered office is in London (E17), in the Waltham Forest local authority area, London. Show E17 6BU on a map.
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Shared registered office
58 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if First Fix Electrical 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
- 12536028
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 March 2020 (6 years ago)
- Registered office
- Unit Da2 Sutherland House, 43 Sutherland Road, London, E17 6BU
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
Electrical installation (SIC 43210)
Engineering related scientific and technical consulting activities (SIC 71122)
Security systems service activities (SIC 80200) - Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 25 March 2026
- Previous names
- Kalyon Engineering and Consulting Ltd (until 22 Oct 2025)
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 London
Other active civil engineering contractors registered in London.
- Firstpoint Connections Ltd2025
- Fiskerton Bess Limited2022
- Fisniku Civil Engineering Ltd2026
- Fivenines Engineering Ltd2025
- Flexion Energy UK Storage Ltd2021
- Floatarm Trading Limited2001
- Flynn Rail Services Ltd2026
- FN Construction Limited2015
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are First Fix Electrical Ltd's accounts due?
First Fix Electrical Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is First Fix Electrical Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is First Fix Electrical Ltd still trading?
First Fix Electrical 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 First Fix Electrical Ltd do?
First Fix Electrical Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220); Electrical installation (SIC 43210); Engineering related scientific and technical consulting activities (SIC 71122); Security systems service activities (SIC 80200).
How old is First Fix Electrical Ltd?
First Fix Electrical Ltd was incorporated on 26 March 2020, 6 years ago.
What is the penalty if First Fix 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 First Fix Electrical 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.