- Companies
- Plumbers and heating engineers
- Kings Lynn
- Dempsey Heating Limited
Dempsey Heating Limited
- Company number
- 03205379
- Incorporated
- 30 May 199630 years trading
- Registered office
- 48 King Street, Kings Lynn, Norfolk, PE30 1HE
- Nature of business
- Plumbing, heat and air-conditioning installation
Dempsey Heating Limited is a 30-year-old private limited company registered in Kings Lynn, company number 03205379, one of 12 plumbing and heating companies in Kings Lynn. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 up £315K (+26.2%) on the year before, to £1.5M.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £1.9M against £624K owed within a year: 3.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £1.5M | £396K | £1.9M | £624K | 0 |
| 31 May 2024 | £1.2M | £933K | £1.5M | £610K | 36 |
| 31 May 2023 | £868K | £482K | £1.1M | £415K | 33 |
| 31 May 2022 | £584K | £381K | £758K | £340K | 29 |
| 31 May 2021 | £643K | £455K | £856K | £371K | 30 |
Where Dempsey Heating Limited is registered
The registered office is in Kings Lynn (PE30), in the King's Lynn and West Norfolk local authority area, East of England. Show PE30 1HE on a map.
Other trade companies in PE30
- Fishers Building Services LtdBuilders
- Meadowfields Holdings LimitedBuilders
- Gotsell Plastering & Property LimitedPlasterers
- Meadowvale Holdings LimitedBuilders
- K D Motor Traders LtdMotor traders
- Squeegeeright LimitedCleaning companies
- LS Building Developments LimitedBuilders
- JC Labour LtdInstallers
Shared registered office
54 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 Dempsey Heating 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 03205379
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 May 1996 (30 years ago)
- Registered office
- 48 King Street, Kings Lynn, Norfolk, PE30 1HE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 30 May 2026
- Charges (mortgages)
- 0 outstanding of 4 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 Kings Lynn
Other active plumbing and heating companies registered in Kings Lynn.
- Gaswise Services Limited2000
- Heatsync Limited2014
- Len Plain Limited2002
- MSB Heating & Plumbing Ltd2019
- Shaw Heat Ltd2025
- 4 Heat Limited2012
- Abbey Boilers & Heating Ltd2014
- Ahs (Norfolk) Limited2012
All plumbing and heating companies in Kings Lynn · All trades in Kings Lynn · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dempsey Heating Limited's accounts due?
Dempsey Heating Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Dempsey Heating Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Dempsey Heating Limited still trading?
Dempsey Heating 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 Dempsey Heating Limited do?
Dempsey Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dempsey Heating Limited?
Dempsey Heating Limited was incorporated on 30 May 1996, 30 years ago.
What is the penalty if Dempsey Heating 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 Dempsey Heating 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.