- Companies
- Civil engineering
- Plymouth
- Marc Sealey Limited
Marc Sealey Limited
- Company number
- 06860171
- Incorporated
- 26 Mar 200917 years trading
- Registered office
- 18 Merafield Drive, Plymouth, PL7 1TP
- Nature of business
- Construction of other civil engineering projects n.e.c.
Marc Sealey Limited is a 17-year-old private limited company registered in Plymouth, company number 06860171, one of 41 civil engineering contractors in Plymouth. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £3,983 (+26%) on the year before, to £19K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £21K against £6,698 owed within a year: 3.1 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £19K | £21K | £6,698 | 1 | |
| 31 Mar 2024 | £15K | £15K | £4,713 | 1 | |
| 31 Mar 2023 | £14K | £30K | £20K | 1 | |
| 31 Mar 2022 | £5,543 | £37K | £34K | 1 | |
| 31 Mar 2021 | -£2,976 | £23K | £28K | 1 | |
| 31 Mar 2020 | £7,540 | £31K | £25K | 1 | |
| 31 Mar 2019 | £504 | £27K | £28K | 1 | |
| 31 Mar 2018 | £1,837 | £27K | £26K | ||
| 31 Mar 2017 | £2,227 | £29K | £27K |
Where Marc Sealey Limited is registered
The registered office is in Plymouth (PL7), in the Plymouth local authority area, South West. Show PL7 1TP on a map.
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What happens if Marc Sealey 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
- 06860171
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 March 2009 (17 years ago)
- Registered office
- 18 Merafield Drive, Plymouth, PL7 1TP
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 3 April 2026
- Previous names
- Marc Selley Limited (until 22 Apr 2009)
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Plymouth
Other active civil engineering contractors registered in Plymouth.
- Mechanus Gravitas Ltd2025
- Moore Construction Southwest Ltd2022
- Nimar Services Ltd2022
- Optical Civil Engineering Ltd2014
- Parker Measured Surveys Ltd2023
- Quantock Engineering Services Ltd2025
- SDS Civils (SW) Ltd.2016
- Sean Rees Engineering Services Ltd2011
All civil engineering contractors in Plymouth · All trades in Plymouth · Civil engineering across the UK
Frequently asked questions
When are Marc Sealey Limited's accounts due?
Marc Sealey 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 Marc Sealey Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Marc Sealey Limited still trading?
Marc Sealey 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 Marc Sealey Limited do?
Marc Sealey Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Marc Sealey Limited?
Marc Sealey Limited was incorporated on 26 March 2009, 17 years ago.
What is the penalty if Marc Sealey 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 Marc Sealey 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.