- Companies
- Plumbers and heating engineers
- Southampton
- McCarthy Interiors Limited
McCarthy Interiors Limited
- Company number
- 12588023
- Incorporated
- 6 May 20206 years trading
- Registered office
- Flat 3 - Guild House, 4A Briton Street, Southampton, SO14 3EY
- Nature of business
- Plumbing, heat and air-conditioning installation; Joinery installation; Floor and wall covering; Painting
McCarthy Interiors Limited is a 6-year-old private limited company registered in Southampton, company number 12588023, one of 246 plumbing and heating companies in Southampton. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 2028.
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 £7,695 (-131.5%) on the year before, to -£1,845.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £4,668 against £12K owed within a year: 0.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | -£1,845 | £4,668 | £12K | 1 | |
| 31 May 2025 | £5,850 | £8,138 | £9,240 | 1 | |
| 31 May 2024 | £5,431 | £8,395 | £7,393 | 1 | |
| 31 May 2023 | £14K | £13K | £5,420 | 1 | |
| 31 May 2022 | £1,456 | £2,749 | £618 | 1 | |
| 31 May 2021 | £1 | 1 |
Who runs and owns McCarthy Interiors Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** M*** | Director | May 2020 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| R*** B*** | Director | May 2020 | May 2020 |
Person with significant control
Where McCarthy Interiors Limited is registered
The registered office is in Southampton (SO14), in the Southampton local authority area, South East. Show SO14 3EY on a map.
Other trade companies in SO14
- Cat Garage LtdMechanics and garages
- Sonix LtdBuilders
- Vanie & Dick LtdBuilders
- 33 Motors LtdMotor traders
- Pure Light Cleaning LtdCleaning companies
- Cccjr Trading LimitedMotor traders
- Otess LtdFloor and wall tilers
- Bevertex LimitedElectricians
Also registered at this address
2 other companies use the same registered office as McCarthy Interiors Limited.
- B58Bible LimitedMotor traders
- MDS Home Improvements LimitedFinishing trades
What happens if McCarthy Interiors 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 12588023
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 May 2020 (6 years ago)
- Registered office
- Flat 3 - Guild House, 4A Briton Street, Southampton, SO14 3EY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Joinery installation (SIC 43320)
Floor and wall covering (SIC 43330)
Painting (SIC 43341) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 5 May 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Southampton
Other active plumbing and heating companies registered in Southampton.
- Mekkmaster Boiler Repair Ltd2025
- MF Plumbing Solutions Ltd2025
- MH3 Plumbing and Heating (Southern) Limited2015
- Michael Todd Plumbing & Heating Ltd2006
- Mikes Plumbing & Heating Ltd2009
- Morrison Plumbing and Heating Ltd2023
- Morts Plumbing & Heating Limited2017
- MPH South Ltd2026
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are McCarthy Interiors Limited's accounts due?
McCarthy Interiors Limited's next accounts are due at Companies House by 29 February 2028 (in 505 days), covering the period to 31 May 2027.
When is McCarthy Interiors Limited's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is McCarthy Interiors Limited still trading?
McCarthy Interiors 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 Interiors Limited do?
McCarthy Interiors Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Joinery installation (SIC 43320); Floor and wall covering (SIC 43330); Painting (SIC 43341).
How old is McCarthy Interiors Limited?
McCarthy Interiors Limited was incorporated on 6 May 2020, 6 years ago.
Who runs McCarthy Interiors Limited?
McCarthy Interiors Limited has 1 active director, the longest-serving appointed in May 2020. Their names and service addresses are on the Companies House register.
Who owns McCarthy Interiors Limited?
One person or company has significant control of McCarthy Interiors Limited: an individual (owns 75% or more of the shares).
What is the penalty if McCarthy Interiors 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 Interiors 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.