- Companies
- Plumbers and heating engineers
- Pwllheli
- Dyffryn Heating Ltd
Dyffryn Heating Ltd
- Company number
- 14473456
- Incorporated
- 9 Nov 20223 years trading
- Registered office
- 1 Thomas Buildings, Pwllheli, LL53 5HH
- Nature of business
- Plumbing, heat and air-conditioning installation
Dyffryn Heating Ltd is a 3-year-old private limited company registered in Pwllheli, company number 14473456, one of 11 plumbing and heating companies in Pwllheli. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £24K (+44.6%) on the year before, to £77K.
- Current assets of £94K against £58K owed within a year: 1.6 times cover.
- 3 employees on average, up from 1 the year before.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £77K | £44K | £94K | £58K | 3 |
| 30 Nov 2024 | £53K | £31K | £63K | £35K | 1 |
| 30 Nov 2023 | £18K | £15K | £65K | £60K | 1 |
Where Dyffryn Heating Ltd is registered
The registered office is in Pwllheli (LL53), in the Gwynedd local authority area, Wales. Show LL53 5HH on a map.
Other trade companies in LL53
- E Thomas Plumbing and Heating Plymio A Gwresogi CyfPlumbers and heating engineers
- Cadelio CyfSpecialist contractors
- Halpine Construction LimitedJoiners and carpenters
- Feucht Engineering LtdMachinery repair and installation
- Stuart Livingstone LtdPlumbers and heating engineers
- Teiars Hughes Tyres LtdMechanics and garages
- Saevar Solutions LtdCleaning companies
- Dragon Detailing & Body Repairs LtdMotor traders
Also registered at this address
16 other companies use the same registered office as Dyffryn Heating Ltd.
- Abersoch Boat Works LimitedMachinery repair and installation
- Adeiladwaith Richard Williams Construction LtdProperty developers
- Cadelio CyfSpecialist contractors
- D. Jones Decorators LimitedPainters and decorators
- E Thomas Plumbing and Heating Plymio A Gwresogi CyfPlumbers and heating engineers
- Gwynedd Windscreens LimitedMechanics and garages
- LJS Construction LimitedProperty developers
- Llnau Haze Cleaning LimitedCleaning companies
- Llyn Marine Services LimitedMachinery repair and installation
- M P Plumbing LimitedPlumbers and heating engineers
- Mela Energy LtdPlumbers and heating engineers
- Or Trefor LimitedCivil engineering
- Peninsula Security LtdElectricians
- Penllyn Conservatories LimitedInstallers
- Radix Shrewsbury LimitedLandscapers and gardeners
- Sean Booth Landscapes LimitedLandscapers and gardeners
What happens if Dyffryn 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 14473456
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 November 2022 (3 years ago)
- Registered office
- 1 Thomas Buildings, Pwllheli, LL53 5HH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 8 November 2025
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 Pwllheli
Other active plumbing and heating companies registered in Pwllheli.
- E Thomas Plumbing and Heating Plymio A Gwresogi Cyf2026
- G Jones Heating & Plumbing Ltd2007
- Llyn Plumbing & Heating Ltd2020
- M P Plumbing Limited2011
- M Wynn Plumbing Cyf2010
- Malcolm Roberts Limited2006
- Mela Energy Ltd2020
- Stuart Livingstone Ltd2026
All plumbing and heating companies in Pwllheli · All trades in Pwllheli · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dyffryn Heating Ltd's accounts due?
Dyffryn Heating Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Dyffryn Heating Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Dyffryn Heating Ltd still trading?
Dyffryn 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 Dyffryn Heating Ltd do?
Dyffryn Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dyffryn Heating Ltd?
Dyffryn Heating Ltd was incorporated on 9 November 2022, 3 years ago.
What is the penalty if Dyffryn 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 Dyffryn 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.