- Companies
- Machinery repair and installation
- London
- Seadag Companies Group Ltd
Seadag Companies Group Ltd
- Company number
- 10197086
- Incorporated
- 24 May 201610 years trading
- Registered office
- Seadag Companies Group Ltd, 20 Wenlock Road, London, N1 7GU
- Nature of business
- Repair of machinery; Installation of industrial machinery and equipment; Other specialised construction activities n.e.c.; Engineering related scientific and technical consulting activities
Seadag Companies Group Ltd is a 10-year-old private limited company registered in London, company number 10197086, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £28K on the year before, to £28K.
- Net assets rose in 2 of 8 year-on-year comparisons on record.
- 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 |
|---|---|---|---|---|---|
| 31 May 2025 | £28K | £28K | 1 | ||
| 31 May 2024 | £2 | 1 | |||
| 31 May 2023 | £3 | £1 | 1 | ||
| 31 May 2022 | £1 | £1 | 1 | ||
| 31 May 2021 | £1 | 2 | |||
| 31 May 2020 | £1 | ||||
| 31 May 2019 | £1 | ||||
| 31 May 2018 | £1 | ||||
| 31 May 2017 | £1 | £1 |
Where Seadag Companies Group Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
Other trade companies in N1
- Tagwise LtdSpecialist contractors
- Sphere Aviation Solutions UK LtdMachinery repair and installation
- Get IT Done Builders LtdJoiners and carpenters
- Evolution Products LimitedMotor traders
- Fleetstone Trading LtdMotor traders
- Kenneth Brady LtdElectricians
- UK Import Export LtdBuilders
- Magic Door Services LimitedMachinery repair and installation
What happens if Seadag Companies Group 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 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
- 10197086
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 May 2016 (10 years ago)
- Registered office
- Seadag Companies Group Ltd, 20 Wenlock Road, London, N1 7GU
- Nature of business
- Repair of machinery (SIC 33120)
Installation of industrial machinery and equipment (SIC 33200)
Other specialised construction activities n.e.c. (SIC 43999)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 23 May 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in London
Other active machinery repair and installation companies registered in London.
- Seafleetbackbone Ltd2025
- Seamless Repairs Ltd2023
- Sean Kelly Lubrications Limited2008
- Seatbelt Services Limited2008
- Seavia Ltd2022
- Secure Flame Protection Ltd2026
- Security Systems 247 Limited2010
- Sefa Electrical Services Ltd2025
All machinery repair and installation companies in London · All trades in London · Machinery repair and installation across the UK
Frequently asked questions
When are Seadag Companies Group Ltd's accounts due?
Seadag Companies Group Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Seadag Companies Group Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Seadag Companies Group Ltd still trading?
Seadag Companies Group 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 Seadag Companies Group Ltd do?
Seadag Companies Group Ltd is registered under Repair of machinery (SIC 33120); Installation of industrial machinery and equipment (SIC 33200); Other specialised construction activities n.e.c. (SIC 43999); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Seadag Companies Group Ltd?
Seadag Companies Group Ltd was incorporated on 24 May 2016, 10 years ago.
What is the penalty if Seadag Companies Group 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 Seadag Companies Group 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.