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- Seakin Construction Ltd
Company profile · Installers
Seakin Construction Ltd
Seakin Construction Ltd is a 2-year-old private limited company registered in London, company number 15529694, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House.
Seakin Construction 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 down £2,126 (-22.1%) on the year before, to £7,510.
- Current assets of £24K against £16K owed within a year: 1.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £7,510 | £24K | £16K | 1 | |
| 31 Mar 2025 | £9,636 | £487 | £12K | £2,237 | 1 |
Where Seakin Construction Ltd is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 8QJ on a map.
Other trade companies in N12
- Sullivan Property and Maintenance LtdFacilities management
- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
Shared registered office
48 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Seakin Construction 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 15529694
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 February 2024 (2 years ago)
- Registered office
- C/O D & K Accountancy Services Limited Solar House, 915 High Road, London, N12 8QJ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 27 February 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Sealgenius UK Limited2026
- Sealteck Sealing Solutions Ltd2026
- Searcha TM Ltd2022
- Secon Group Ltd2021
- Secteam Ltd2019
- Secure CCTV Solutions Ltd2026
- Secured Fencing Solutions Ltd2022
- Securelink Networking Ltd2025
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Seakin Construction Ltd's accounts due?
Seakin Construction Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Seakin Construction Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Seakin Construction Ltd still trading?
Seakin Construction 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 Seakin Construction Ltd do?
Seakin Construction Ltd is registered under Other construction installation (SIC 43290).
How old is Seakin Construction Ltd?
Seakin Construction Ltd was incorporated on 28 February 2024, 2 years ago.
What is the penalty if Seakin Construction 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 Seakin Construction 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.