- Companies
- Electricians
- London
- Sigmaa Electrical Ltd
Sigmaa Electrical Ltd
- Company number
- 11515131
- Incorporated
- 13 Aug 20188 years trading
- Registered office
- 28 Armada Way, Flat 7, Dockyard House, London, E6 7AE
- Nature of business
- Electrical installation
Sigmaa Electrical Ltd is a 8-year-old private limited company registered in London, company number 11515131, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £17K (+43.9%) on the year before, to £55K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £65K against £22K owed within a year: 3.0 times cover.
- 3 employees on average, up from 2 the year before.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £55K | £65K | £22K | 3 | |
| 31 Aug 2024 | £38K | £19K | £12K | 2 | |
| 31 Aug 2023 | £12K | £16K | £3,459 | 2 | |
| 31 Aug 2022 | £9,622 | £18K | £8,734 | 2 | |
| 31 Aug 2021 | £8,879 | £16K | £7,016 | 2 | |
| 31 Aug 2020 | £11K | £20K | £9,034 | 2 | |
| 31 Aug 2019 | £1,377 | £3,835 | £5,212 | 2 |
Where Sigmaa Electrical Ltd is registered
The registered office is in London (E6), in the Newham local authority area, London. Show E6 7AE on a map.
Other trade companies in E6
- Dabostech LtdProperty developers
- Ryanlyn LimitedCleaning companies
- Benjamin's Decorating Services LimitedSpecialist contractors
- Wexstons C LtdRepair services
- Ramya Motors LtdMotor traders
- Nil Art Decor LtdBuilders
- Ari & Bleri LtdBuilders
- Gorgos Electrical Services LtdElectricians
What happens if Sigmaa 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 11515131
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 August 2018 (8 years ago)
- Registered office
- 28 Armada Way, Flat 7, Dockyard House, London, E6 7AE
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 16 July 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 London
Other active electrical contractors registered in London.
- Signature Sparks Ltd2026
- Silco Ltd2025
- Silva Electricals Limited2024
- Simarc Electricals Limited2018
- Simmons Technical Services Ltd2026
- Simplecore Ltd2024
- Simplex Electrical Limited2019
- Simply Electrical Contractors Ltd2021
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Sigmaa Electrical Ltd's accounts due?
Sigmaa Electrical Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Sigmaa Electrical Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Sigmaa Electrical Ltd still trading?
Sigmaa 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 Sigmaa Electrical Ltd do?
Sigmaa Electrical Ltd is registered under Electrical installation (SIC 43210).
How old is Sigmaa Electrical Ltd?
Sigmaa Electrical Ltd was incorporated on 13 August 2018, 8 years ago.
What is the penalty if Sigmaa 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 Sigmaa 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.