- Company number
- 10665500
- Incorporated
- 13 Mar 20179 years trading
- Registered office
- The Uplands Stables Lane, Barnburgh, Doncaster, DN5 7EJ
- Nature of business
- Construction of domestic buildings
Mark Sellars Construction 2017 Limited is a 9-year-old private limited company registered in Doncaster, company number 10665500, one of 306 building contractors in Doncaster. 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 down £10K (-22.3%) on the year before, to £35K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- 2 employees on average, down from 3 the year before.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £35K | £3,568 | £0 | 2 | |
| 31 Mar 2024 | £45K | £17K | £11K | 3 | |
| 31 Mar 2023 | £39K | £24K | £9,653 | 3 | |
| 31 Mar 2022 | £28K | £16K | £3,600 | 3 | |
| 31 Mar 2021 | £100 | £100 | 1 | ||
| 31 Mar 2020 | £100 | £100 | 1 | ||
| 31 Mar 2019 | £100 | £100 | |||
| 31 Mar 2018 | £100 | £100 |
Where Mark Sellars Construction 2017 Limited is registered
The registered office is in Doncaster (DN5), in the Doncaster local authority area, Yorkshire and The Humber. Show DN5 7EJ on a map.
Other trade companies in DN5
- D3 Lifestyle Group LimitedMotor traders
- Thurnscoe Bungalows LimitedBuilders
- Mastercraft Roofing and Home Improvements LtdRoofers
- Just Vags LtdMechanics and garages
- Wilson Decorators (Doncaster) LtdPainters and decorators
- Surface Groundworks LimitedLandscapers and gardeners
- Vaulto Automotive Customisation LtdMechanics and garages
- GR33N Group (G3) LtdProperty developers
What happens if Mark Sellars Construction 2017 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
- 10665500
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 March 2017 (9 years ago)
- Registered office
- The Uplands Stables Lane, Barnburgh, Doncaster, DN5 7EJ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 12 March 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Doncaster
Other active building contractors registered in Doncaster.
- Martin & Co Building Contractors Limited2016
- Mathias Express Ltd2026
- Matt Roberts Builders Limited2014
- Matun Enterprise Limited2024
- Meliora KBB Limited2017
- Mell Developments Ltd2003
- Mep Properties Ltd2026
- Mercury Properties Industrial Limited2015
All building contractors in Doncaster · All trades in Doncaster · Builders across the UK
Frequently asked questions
When are Mark Sellars Construction 2017 Limited's accounts due?
Mark Sellars Construction 2017 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 Mark Sellars Construction 2017 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 Mark Sellars Construction 2017 Limited still trading?
Mark Sellars Construction 2017 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 Mark Sellars Construction 2017 Limited do?
Mark Sellars Construction 2017 Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Mark Sellars Construction 2017 Limited?
Mark Sellars Construction 2017 Limited was incorporated on 13 March 2017, 9 years ago.
What is the penalty if Mark Sellars Construction 2017 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 Mark Sellars Construction 2017 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.