- Companies
- Plumbers and heating engineers
- Luton
- John Smart Heating Ltd
John Smart Heating Ltd
- Company number
- 15985237
- Incorporated
- 29 Sep 20242 years trading
- Registered office
- 8 Cornel Close, Luton, LU1 5SJ
- Nature of business
- Plumbing, heat and air-conditioning installation
John Smart Heating Ltd is a 2-year-old private limited company registered in Luton, company number 15985237, one of 158 plumbing and heating companies in Luton. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 September 2025, as filed at Companies House.
Where John Smart Heating Ltd is registered
The registered office is in Luton (LU1), in the Luton local authority area, East of England. Show LU1 5SJ on a map.
Other trade companies in LU1
- Metalia Plastering LtdPlasterers
- Luton Bodyworks LtdMechanics and garages
- Speedyone LtdGroundworks and demolition
- Varion Construction LtdProperty developers
- Bromhams LtdMotor traders
- Vertex Home Improvements LtdRoofers
- Skillede LtdElectricians
- Avram Cleaning LtdCleaning companies
What happens if John Smart 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 15985237
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 2024 (2 years ago)
- Registered office
- 8 Cornel Close, Luton, LU1 5SJ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 28 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 Luton
Other active plumbing and heating companies registered in Luton.
- JW Plumbing Services Ltd2022
- K. Sellers Plumbing & Heating Limited2006
- Karol Heating and Plumbing Limited2020
- Kaya Water and Fire Ltd2025
- Kinergy Solutions Ltd2025
- Kinetik Building Services Limited2010
- Klaus Construction Ltd2020
- L and L Repair and Maintenance Services Ltd2026
All plumbing and heating companies in Luton · All trades in Luton · Plumbers and heating engineers across the UK
Frequently asked questions
When are John Smart Heating Ltd's accounts due?
John Smart Heating Ltd's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is John Smart Heating Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is John Smart Heating Ltd still trading?
John Smart 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 John Smart Heating Ltd do?
John Smart Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is John Smart Heating Ltd?
John Smart Heating Ltd was incorporated on 29 September 2024, 2 years ago.
What is the penalty if John Smart 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 John Smart 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.