- Companies
- Specialist contractors
- Luton
- Cassiopeia & Sons Ltd
Cassiopeia & Sons Ltd
- Company number
- 10474333
- Incorporated
- 11 Nov 20169 years trading
- Registered office
- 55 Thornhill Road, Luton, LU4 8EY
- Nature of business
- Other specialised construction activities n.e.c.
Cassiopeia & Sons Ltd is a 9-year-old private limited company registered in Luton, company number 10474333, one of 195 specialist construction companies in Luton. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £8,073 on the year before, to -£7,684.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £2,005 against £9,689 owed within a year: 0.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | -£7,684 | £1,332 | £2,005 | £9,689 | 1 |
| 30 Nov 2024 | £389 | £14K | £15K | £13K | 1 |
| 30 Nov 2023 | £171 | £13K | £13K | £10K | 1 |
| 30 Nov 2022 | £426 | £14K | £14K | £8,646 | 1 |
| 30 Nov 2021 | £376 | £44K | £49K | £42K | 1 |
| 30 Nov 2020 | £1,010 | £44K | £33K | 1 | |
| 30 Nov 2019 | £440 | £3,665 | £3,665 | £3,225 | 1 |
| 30 Nov 2018 | £328 | £428 | £2,676 | £2,348 | 1 |
| 30 Nov 2017 | £200 | £79 | £6,098 | £5,898 | 1 |
Where Cassiopeia & Sons Ltd is registered
The registered office is in Luton (LU4), in the Luton local authority area, East of England. Show LU4 8EY on a map.
Other trade companies in LU4
- Kai Properties LtdProperty developers
- Surrey Design and Build LtdRoofers
- Lignora LtdFloor and wall tilers
- MK Services Pro LtdProperty developers
- Amp Vision Solutions LtdElectricians
- S R Auto Motors LimitedMotor traders
- Arseley Motor Group LtdMotor traders
- F Martini Building & Roofing LtdBuilders
Also registered at this address
2 other companies use the same registered office as Cassiopeia & Sons Ltd.
- MBP Agency LtdFinishing trades
- Pi R2 Development LtdSpecialist contractors
What happens if Cassiopeia & Sons 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 10474333
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 November 2016 (9 years ago)
- Registered office
- 55 Thornhill Road, Luton, LU4 8EY
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 10 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Luton
Other active specialist construction companies registered in Luton.
- Charan Construction Ltd2017
- Chriss Trans Ltd2015
- Citi Sialkot Cunstruction Company Limited2025
- Cmec Solutions Ltd2014
- Cojo Interiors Ltd2019
- Commercial Improvements Limited2018
- Conaf Ltd2023
- Confey Civils Ltd2023
All specialist construction companies in Luton · All trades in Luton · Specialist contractors across the UK
Frequently asked questions
When are Cassiopeia & Sons Ltd's accounts due?
Cassiopeia & Sons Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Cassiopeia & Sons Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Cassiopeia & Sons Ltd still trading?
Cassiopeia & Sons 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 Cassiopeia & Sons Ltd do?
Cassiopeia & Sons Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Cassiopeia & Sons Ltd?
Cassiopeia & Sons Ltd was incorporated on 11 November 2016, 9 years ago.
What is the penalty if Cassiopeia & Sons 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 Cassiopeia & Sons 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.