- Companies
- Electricians
- Southampton
- Alt Designer Ltd
Alt Designer Ltd
- Company number
- 16462960
- Incorporated
- 20 May 20251 year trading
- Registered office
- 163 John Thornycroft Road, Southampton, Hampshire, SO19 9XL
- Nature of business
- Electrical installation; Other engineering activities
Alt Designer Ltd is a 1-year-old private limited company registered in Southampton, company number 16462960, one of 342 electrical contractors in Southampton. Its next accounts are due at Companies House on 20 February 2027, and its first CT600 is due at HMRC on 19 May 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where Alt Designer Ltd is registered
The registered office is in Southampton (SO19), in the Southampton local authority area, South East. Show SO19 9XL on a map.
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What happens if Alt Designer 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 20 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 Feb 2027 to 20 Mar 2027 | £150 |
| 1 to 3 months late | 21 Mar 2027 to 20 May 2027 | £375 |
| 3 to 6 months late | 21 May 2027 to 20 Aug 2027 | £750 |
| More than 6 months late | From 21 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 16462960
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 May 2025 (1 year ago)
- Registered office
- 163 John Thornycroft Road, Southampton, Hampshire, SO19 9XL
- Nature of business
- Electrical installation (SIC 43210)
Other engineering activities (SIC 71129) - Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 19 May 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 Southampton
Other active electrical contractors registered in Southampton.
- Am Young Electrical Limited2023
- Ambra Electrical Ltd2016
- An76 Limited2019
- Anchor Pipework Limited2013
- Anchor Real Estate Limited2017
- Andluc Limited2006
- Anthony Richard Tonks Ltd2021
- Armex Electrical Limited2017
All electrical contractors in Southampton · All trades in Southampton · Electricians across the UK
Frequently asked questions
When are Alt Designer Ltd's accounts due?
Alt Designer Ltd's next accounts are due at Companies House by 20 February 2027 (in 130 days), covering the period to 31 May 2026.
When is Alt Designer 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 19 May 2026, due by 19 May 2027, and one for the period to 31 May 2026, due by 31 May 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Alt Designer Ltd still trading?
Alt Designer 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 Alt Designer Ltd do?
Alt Designer Ltd is registered under Electrical installation (SIC 43210); Other engineering activities (SIC 71129).
How old is Alt Designer Ltd?
Alt Designer Ltd was incorporated on 20 May 2025, 1 year ago.
What is the penalty if Alt Designer 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 Alt Designer 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.