- Companies
- Plumbers and heating engineers
- Portsmouth
- KM Plumbing & Heating Ltd
KM Plumbing & Heating Ltd
- Company number
- 10427358
- Incorporated
- 13 Oct 201610 years trading
- Registered office
- Gatcombe House, Copnor Road, Portsmouth, PO3 5EJ
- Nature of business
- Plumbing, heat and air-conditioning installation
KM Plumbing & Heating Ltd is a 10-year-old private limited company registered in Portsmouth, company number 10427358, one of 141 plumbing and heating companies in Portsmouth. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 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 £3,388 (-37.5%) on the year before, to £5,653.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £27K against £13K owed within a year: 2.0 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £5,653 | £27K | £13K | 2 | |
| 28 Feb 2025 | £9,041 | £42K | £16K | 2 | |
| 29 Feb 2024 | £5,439 | £6,701 | £5,138 | 1 | |
| 31 Oct 2022 | £13K | £16K | £7,324 | 1 | |
| 31 Oct 2021 | £9,967 | £12K | £6,426 | 1 | |
| 31 Oct 2020 | £3,474 | £6,952 | £3,848 | 1 | |
| 31 Oct 2019 | £551 | £4,988 | £4,931 | ||
| 31 Oct 2018 | £382 | £11K | £11K | ||
| 31 Oct 2017 | £2 | £20K | £21K |
Where KM Plumbing & Heating Ltd is registered
The registered office is in Portsmouth (PO3), in the Portsmouth local authority area, South East. Show PO3 5EJ on a map.
Other trade companies in PO3
- GJM Construction LtdBuilders
- Al Fajar Building LimitedFinishing trades
- New Milton Decor LtdPainters and decorators
- Portsmouth Autos LtdMechanics and garages
- Henley Roofing Group LimitedInstallers
- I’M Covered 365 Ac LtdPlumbers and heating engineers
- Scope Bodyshop LtdMechanics and garages
- GP Technical LtdSpecialist contractors
Shared registered office
157 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 KM Plumbing & Heating 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 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 10427358
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 October 2016 (10 years ago)
- Registered office
- Gatcombe House, Copnor Road, Portsmouth, PO3 5EJ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 11 April 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Portsmouth
Other active plumbing and heating companies registered in Portsmouth.
- L.Dubisson Plumbing and Heating Ltd2022
- Lark Project Services Ltd2022
- Lustra Installs Ltd2023
- Lynch Mechanical, Plumbing & Heating Ltd2022
- Major Cooling Ltd2025
- Mark Howe Plumbing & Heating Limited1998
- Mark Kennett Plumbing & Heating Ltd2012
- MG Heating (Southern) Limited2013
All plumbing and heating companies in Portsmouth · All trades in Portsmouth · Plumbers and heating engineers across the UK
Frequently asked questions
When are KM Plumbing & Heating Ltd's accounts due?
KM Plumbing & Heating Ltd's next accounts are due at Companies House by 30 November 2027 (in 413 days), covering the period to 28 February 2027.
When is KM Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is KM Plumbing & Heating Ltd still trading?
KM Plumbing & Heating 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 KM Plumbing & Heating Ltd do?
KM Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is KM Plumbing & Heating Ltd?
KM Plumbing & Heating Ltd was incorporated on 13 October 2016, 10 years ago.
What is the penalty if KM Plumbing & Heating 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 KM Plumbing & Heating 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.