- Companies
- Finishing trades
- Glasgow
- Mark O'Donnell Sealants Ltd
Mark O'Donnell Sealants Ltd
- Company number
- SC496327
- Incorporated
- 29 Jan 201511 years trading
- Registered office
- C/O Horizon Ca, 5 La Belle Place, Glasgow, G3 7LH
- Nature of business
- Other building completion and finishing
Mark O'Donnell Sealants Ltd is a 11-year-old private limited company registered in Glasgow, company number SC496327, one of 283 building finishing companies in Glasgow. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £1,340 (+3.5%) on the year before, to £40K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £56K against £20K owed within a year: 2.9 times cover.
- 3 employees on average, up from -3 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £40K | £25K | £56K | £20K | 3 |
| 31 Jan 2024 | £39K | £31K | £59K | £22K | -3 |
| 31 Jan 2023 | £1,963 | £10K | £41K | £32K | -3 |
| 31 Jan 2022 | -£21K | £24K | £35K | 0 | |
| 31 Jan 2021 | -£31K | £12K | £12K | £41K | -4 |
| 31 Jan 2020 | -£26K | £3,583 | £33K | -4 | |
| 31 Jan 2019 | £368 | £13K | £19K | £25K | -5 |
| 31 Jan 2018 | £8,711 | £8,563 | £32K | £25K | 4 |
| 31 Jan 2017 | £664 | £5,299 | £24K | £28K | |
| 31 Jan 2016 | £13K | £11K | £34K | £26K |
Where Mark O'Donnell Sealants Ltd is registered
The registered office is in Glasgow (G3), in the Glasgow City local authority area, Scotland. Show G3 7LH on a map.
Other trade companies in G3
- Clyde Electrics Glasgow LimitedElectricians
- Emma's Home & Life Support LtdCleaning companies
- HHP Care2 LtdBuilders
- Fix and Build Joinery LtdJoiners and carpenters
- Betagrid LtdElectricians
- C F H Electrical LtdElectricians
- HR PR Payroll LimitedInstallers
- SPM Scaffolding & Access LimitedCivil engineering
Shared registered office
150 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 Mark O'Donnell Sealants 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- SC496327
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 January 2015 (11 years ago)
- Registered office
- C/O Horizon Ca, 5 La Belle Place, Glasgow, G3 7LH
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 26 January 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Glasgow
Other active building finishing companies registered in Glasgow.
- Marr Projects Ltd2024
- Maydos Developments Limited2006
- MBR Development Limited2015
- MBS Drywall Limited2003
- McBride Properties Ltd2015
- McCalden Construction Ltd2016
- Metod Ltd2025
- MH & CB T/A Lifetime Improvement Group Limited2022
All building finishing companies in Glasgow · All trades in Glasgow · Finishing trades across the UK
Frequently asked questions
When are Mark O'Donnell Sealants Ltd's accounts due?
Mark O'Donnell Sealants Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Mark O'Donnell Sealants Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Mark O'Donnell Sealants Ltd still trading?
Mark O'Donnell Sealants 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 Mark O'Donnell Sealants Ltd do?
Mark O'Donnell Sealants Ltd is registered under Other building completion and finishing (SIC 43390).
How old is Mark O'Donnell Sealants Ltd?
Mark O'Donnell Sealants Ltd was incorporated on 29 January 2015, 11 years ago.
What is the penalty if Mark O'Donnell Sealants 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 Mark O'Donnell Sealants 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.