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- S.G.D. Security Ltd.
Company profile · Electricians
S.G.D. Security Ltd.
S.G.D. Security Ltd. is a 28-year-old private limited company registered in Cardiff, company number 03584065, one of 223 electrical contractors in Cardiff. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 July 2025, as filed at Companies House.
S.G.D. Security Ltd. over the years
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 £25K (+9.4%) on the year before, to £290K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £1.3M against £1.4M owed within a year: 0.9 times cover.
- 25 employees on average, up from 24 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £290K | £201K | £1.3M | £1.4M | 25 |
| 31 Jul 2024 | £265K | £126K | £1.1M | £996K | 24 |
| 31 Jul 2023 | £326K | £192K | £821K | £647K | 22 |
| 31 Jul 2022 | £321K | £141K | £654K | £453K | 21 |
| 31 Jul 2021 | £334K | £151K | £712K | £470K | 21 |
| 31 Jul 2020 | £288K | £235K | £652K | £427K | 18 |
| 31 Jul 2019 | £210K | £2,716 | £614K | £486K | 20 |
| 31 Jul 2018 | £260K | £2,524 | £712K | £420K | 20 |
| 31 Jul 2017 | £255K | £1,171 | £693K | £620K | 20 |
| 31 Jul 2016 | £292K | £42K | £670K | £659K |
Where S.G.D. Security Ltd. is registered
The registered office is in Cardiff (CF3), in the Cardiff local authority area, Wales. Show CF3 2EX on a map.
Other trade companies in CF3
- Ions Trade & Projects LtdInstallers
- Fly Tech LtdMachinery repair and installation
- Dragonfly Site Services LtdSpecialist contractors
- Arc Energy Systems LtdElectricians
- Floyd’S Consultants LtdProperty developers
- Blues Mechanical LtdInstallers
- Climate Control Cardiff LtdPlumbers and heating engineers
- Campo & Co Developments LtdBuilders
Also registered at this address
1 other company uses the same registered office as S.G.D. Security Ltd..
- SGD (South West) LtdElectricians
What happens if S.G.D. Security 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 03584065
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 June 1998 (28 years ago)
- Registered office
- Unit 5 Melyn Mair Business Park, Wentloog Avenue, Cardiff, South Glamorgan, CF3 2EX
- Nature of business
- Electrical installation (SIC 43210)
Other service activities n.e.c. (SIC 96090) - Year end
- 31 July (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 7 June 2026
- Charges (mortgages)
- 4 outstanding of 11 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 Cardiff
Other active electrical contractors registered in Cardiff.
- Saa Electrical Service Limited2014
- Safeguard Electrical Limited2018
- Securalec Ltd2014
- Selectrofix Ltd2017
- SGD (South West) Ltd2003
- Sinclair Electrical Cardiff Ltd2013
- Site Electrical Solutions Limited2005
- Sjad Electrical Ltd2017
All electrical contractors in Cardiff · All trades in Cardiff · Electricians across the UK
Frequently asked questions
When are S.G.D. Security Ltd.'s accounts due?
S.G.D. Security Ltd.'s next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is S.G.D. Security Ltd.'s CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is S.G.D. Security Ltd. still trading?
S.G.D. Security 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 S.G.D. Security Ltd. do?
S.G.D. Security Ltd. is registered under Electrical installation (SIC 43210); Other service activities n.e.c. (SIC 96090).
How old is S.G.D. Security Ltd.?
S.G.D. Security Ltd. was incorporated on 18 June 1998, 28 years ago.
What is the penalty if S.G.D. Security 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 S.G.D. Security 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.