- Companies
- Specialist contractors
- Sea Technical Services Limited
Sea Technical Services Limited
- Company number
- 04223914
- Incorporated
- 29 May 200125 years trading
- Registered office
- Blythewood House, Lake Road Curdridge, Nr Botley, Hampshire, SO32 2HH
- Nature of business
- Other specialised construction activities n.e.c.
Sea Technical Services Limited is a 25-year-old private limited company registered in Nr Botley, company number 04223914, one of the UK's specialist construction companies. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Sea Technical Services LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £7,376 (-35.6%) on the year before, to -£28K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £240 against £28K owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | -£28K | £0 | £240 | £28K | 0 |
| 31 Dec 2023 | -£21K | £61 | £270 | £21K | 0 |
| 31 Dec 2022 | -£18K | £549 | £26K | £44K | 0 |
| 31 Dec 2021 | -£21K | £2,539 | £18K | £39K | 0 |
| 31 Dec 2020 | -£12K | £21K | £33K | £45K | 0 |
| 31 Dec 2019 | -£13K | £23K | £33K | £47K | |
| 31 Dec 2018 | -£21K | £656 | £6,528 | £27K | |
| 31 Dec 2017 | -£22K | £4,082 | £9,955 | £32K | |
| 31 Dec 2016 | -£15K | £2,620 | £20K | £34K | |
| 31 Mar 2016 | -£21K | £11K | £23K | £44K |
Where Sea Technical Services Limited is registered
The registered office is in Nr Botley (SO32), in the Winchester local authority area, South East. Show SO32 2HH on a map.
Other trade companies in SO32
- J. Green Plastering LtdPlasterers
- D&A Groom LtdInstallers
- Clearline Builds LtdBuilders
- Bumpers to Boost Customs LimitedMotor traders
- Chambers Composites LtdSpecialist contractors
- Gilltown Developments LimitedProperty developers
- Woodpabst Developments LimitedProperty developers
- Htwagroup LtdProperty developers
What happens if Sea Technical Services Limited 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 04223914
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 May 2001 (25 years ago)
- Registered office
- Blythewood House, Lake Road Curdridge, Nr Botley, Hampshire, SO32 2HH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 27 January 2026
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
Other active specialist construction companies.
Frequently asked questions
When are Sea Technical Services Limited's accounts due?
Sea Technical Services Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Sea Technical Services Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 December 2025, due by 31 December 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sea Technical Services Limited still trading?
Sea Technical Services Limited 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 Sea Technical Services Limited do?
Sea Technical Services Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sea Technical Services Limited?
Sea Technical Services Limited was incorporated on 29 May 2001, 25 years ago.
What is the penalty if Sea Technical Services Limited 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 Sea Technical Services Limited 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.