- Companies
- Finishing trades
- Watford
- McCarthy & O'Connor Limited
McCarthy & O'Connor Limited
- Company number
- 05595225
- Incorporated
- 18 Oct 200520 years trading
- Registered office
- Suite 13, 5 Hercules Way, Leavesden Park, Watford, Hertfordshire, WD25 7GS
- Nature of business
- Other building completion and finishing
McCarthy & O'Connor Limited is a 20-year-old private limited company registered in Watford, company number 05595225, one of 135 building finishing companies in Watford. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £2,167 (-9.8%) on the year before, to £20K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £37K against £20K owed within a year: 1.8 times cover.
- 4 employees on average during the year.
- 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 Dec 2025 | £20K | £37K | £20K | 4 | |
| 31 Dec 2024 | £22K | £39K | £26K | 4 | |
| 31 Dec 2023 | £22K | £38K | £30K | 4 | |
| 31 Dec 2022 | £79K | £93K | £33K | 4 | |
| 31 Dec 2021 | £63K | £66K | £25K | 4 | |
| 31 Dec 2020 | £65K | £128K | £27K | 4 | |
| 31 Dec 2019 | £45K | £62K | £32K | 4 | |
| 31 Dec 2018 | £34K | £95 | £48K | £32K | 4 |
| 31 Dec 2017 | £9,405 | £95 | £8,390 | £19K | 0 |
| 31 Dec 2016 | £26K | £95 | £34K | £35K |
Where McCarthy & O'Connor Limited is registered
The registered office is in Watford (WD25), in the Three Rivers local authority area, East of England. Show WD25 7GS on a map.
Other trade companies in WD25
- Ardel Construction LimitedBuilders
- Velocity Mechanical LtdPlumbers and heating engineers
- Jpjcm LimitedFinishing trades
- Mix & Go LtdSpecialist contractors
- Colney Prestige Autos LtdMotor traders
- Prestige Garden Services LtdLandscapers and gardeners
- Destinyd LtdMachinery repair and installation
- Leaf Space LimitedFinishing trades
Also registered at this address
10 other companies use the same registered office as McCarthy & O'Connor Limited.
- Ashgood Classic and Sportscars LimitedMotor traders
- Bonham Freeholds LimitedProperty developers
- Dna Refurbishments LimitedSpecialist contractors
- Emsea Investments LtdMotor traders
- George Hugh Contractors LimitedLandscapers and gardeners
- N Hughes Building Contractors LimitedSpecialist contractors
- S.Dell & Son(Investments)LimitedProperty developers
- Trilec Electrical Contractors LimitedElectricians
- Whisbro Mechanical Solutions LimitedSpecialist contractors
- Whistlers LimitedBuilders
What happens if McCarthy & O'Connor 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 05595225
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 October 2005 (20 years ago)
- Registered office
- Suite 13, 5 Hercules Way, Leavesden Park, Watford, Hertfordshire, WD25 7GS
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 31 December 2025
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 Watford
Other active building finishing companies registered in Watford.
- MDF Construction Ltd2014
- Mdna Construction Ltd2017
- Mel McGowan Limited2007
- MGC Bespoke UK Limited2016
- Midnightsparx Ltd2021
- Millennium Corporation Ltd2022
- Nicely Done Contractors Limited2004
- Nicholas Andrei Ltd2014
All building finishing companies in Watford · All trades in Watford · Finishing trades across the UK
Frequently asked questions
When are McCarthy & O'Connor Limited's accounts due?
McCarthy & O'Connor Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is McCarthy & O'Connor Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is McCarthy & O'Connor Limited still trading?
McCarthy & O'Connor 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 McCarthy & O'Connor Limited do?
McCarthy & O'Connor Limited is registered under Other building completion and finishing (SIC 43390).
How old is McCarthy & O'Connor Limited?
McCarthy & O'Connor Limited was incorporated on 18 October 2005, 20 years ago.
What is the penalty if McCarthy & O'Connor 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 McCarthy & O'Connor 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.