- Companies
- Specialist contractors
- Hitchin
- Mark Sullivan Carpentry Ltd
Mark Sullivan Carpentry Ltd
- Company number
- 10978959
- Incorporated
- 25 Sep 20179 years trading
- Registered office
- 52 Dacre Road, Hitchin, Herts, SG5 1QL
- Nature of business
- Other specialised construction activities n.e.c.
Mark Sullivan Carpentry Ltd is a 9-year-old private limited company registered in Hitchin, company number 10978959, one of 45 specialist construction companies in Hitchin. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £3,332 (-96.7%) on the year before, to £113.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £1,316 against £3,047 owed within a year: 0.4 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £113 | £1,316 | £1,316 | £3,047 | 0 |
| 30 Sep 2024 | £3,445 | £744 | £3,424 | £2,438 | 1 |
| 30 Sep 2023 | £11K | £10K | £12K | £4,015 | 1 |
| 30 Sep 2022 | £9,892 | £12K | £13K | £4,985 | 1 |
| 30 Sep 2021 | £12K | £14K | £16K | £6,102 | 1 |
| 30 Sep 2020 | £14K | £12K | £15K | £4,755 | 1 |
| 30 Sep 2019 | £9,790 | £10K | £14K | £5,485 | |
| 30 Sep 2018 | £3,405 | £2,082 | £4,303 | £2,400 |
Where Mark Sullivan Carpentry Ltd is registered
The registered office is in Hitchin (SG5), in the North Hertfordshire local authority area, East of England. Show SG5 1QL on a map.
Other trade companies in SG5
- Unlock Your Dreams LtdProperty developers
- The Peugeot and Renault Man LtdMechanics and garages
- Woods Property Solutions LtdBuilders
- PM Contractors LtdBuilders
- S. Harris Builders LimitedFinishing trades
- Stotfold Property Services LtdBuilders
- SGB Modern Access LtdScaffolders
- Top Class Roofing & Renovations LimitedRoofers
What happens if Mark Sullivan Carpentry 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 10978959
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2017 (9 years ago)
- Registered office
- 52 Dacre Road, Hitchin, Herts, SG5 1QL
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 22 August 2025
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 in Hitchin
Other active specialist construction companies registered in Hitchin.
- Masser Construction Limited1995
- MCK Brickwork Limited2021
- MDS Electrical Contracting Limited2011
- Multi Utility + Surfacing Ltd2007
- N&N Sheq Solutions Ltd2016
- New Dawn Carpentry and Construction Ltd2024
- Parkin Tailored Timber Ltd2026
- Poplars Carpentry Contracting Limited2022
All specialist construction companies in Hitchin · All trades in Hitchin · Specialist contractors across the UK
Frequently asked questions
When are Mark Sullivan Carpentry Ltd's accounts due?
Mark Sullivan Carpentry Ltd's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Mark Sullivan Carpentry Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Mark Sullivan Carpentry Ltd still trading?
Mark Sullivan Carpentry Ltd is listed as active on the Companies House register (checked 12 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 Sullivan Carpentry Ltd do?
Mark Sullivan Carpentry Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mark Sullivan Carpentry Ltd?
Mark Sullivan Carpentry Ltd was incorporated on 25 September 2017, 9 years ago.
What is the penalty if Mark Sullivan Carpentry 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 Sullivan Carpentry Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.