- Companies
- Plumbers and heating engineers
- London
- Dia Plumbing & Heating Ltd
Dia Plumbing & Heating Ltd
- Company number
- 14361423
- Incorporated
- 16 Sep 20224 years trading
- Registered office
- 15 Brideale Close, London, SE15 6NB
- Nature of business
- Plumbing, heat and air-conditioning installation
Dia Plumbing & Heating Ltd is a 4-year-old private limited company registered in London, company number 14361423, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 30 June 2028, and the CT600 for the period to 30 September 2027 is due at HMRC on 30 September 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 up £5,909 (+144.8%) on the year before, to £9,989.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £5,494 against £2,438 owed within a year: 2.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2026 | £9,989 | £5,494 | £2,438 | 1 | |
| 30 Sep 2025 | £4,080 | £1,031 | £794 | 1 | |
| 30 Sep 2024 | £7,458 | £931 | £754 | -1 | |
| 30 Sep 2023 | £7,707 | £280 | 0 |
Where Dia Plumbing & Heating Ltd is registered
The registered office is in London (SE15), in the Southwark local authority area, London. Show SE15 6NB on a map.
Other trade companies in SE15
- Solmay Services LtdCleaning companies
- Max Lee Robinsons Property Services LtdPlumbers and heating engineers
- Aaluxe Cleaning LimitedCleaning companies
- Bronzewood Environmental Services LimitedFinishing trades
- Bashfield Facilities LtdCleaning companies
- Parcel Works Development LimitedProperty developers
- BSF Building Services LtdElectricians
- Pro Decor London LtdBuilders
What happens if Dia 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 June 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2028 to 31 Jul 2028 | £150 |
| 1 to 3 months late | 1 Aug 2028 to 30 Sep 2028 | £375 |
| 3 to 6 months late | 1 Oct 2028 to 31 Dec 2028 | £750 |
| More than 6 months late | From 1 Jan 2029 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2028 | £200 |
| 3 months late | 30 Dec 2028 | another £200 |
| 6 months late | 30 Mar 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 14361423
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 September 2022 (4 years ago)
- Registered office
- 15 Brideale Close, London, SE15 6NB
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2026
- Last confirmation statement
- 15 September 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 London
Other active plumbing and heating companies registered in London.
- Dial One Services Ltd2023
- Dial Plumbing & Heating Ltd2023
- Diamond Cleaning and Maintenance Solutions Ltd2025
- Diamond Gas Ltd2022
- Diamond Plumb Limited2004
- Diamond Plumbers Limited2020
- Diaz Plumbing Ltd2025
- Dibfix Ltd2025
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dia Plumbing & Heating Ltd's accounts due?
Dia Plumbing & Heating Ltd's next accounts are due at Companies House by 30 June 2028 (in 626 days), covering the period to 30 September 2027.
When is Dia Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 30 September 2027 is due at HMRC by 30 September 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2028.
Is Dia Plumbing & Heating Ltd still trading?
Dia Plumbing & Heating Ltd is listed as active on the Companies House register (checked 13 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 Dia Plumbing & Heating Ltd do?
Dia Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dia Plumbing & Heating Ltd?
Dia Plumbing & Heating Ltd was incorporated on 16 September 2022, 4 years ago.
What is the penalty if Dia 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 Dia Plumbing & Heating Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.