- Companies
- Plumbers and heating engineers
- London
- Smart Heating Maintenance Ltd
Smart Heating Maintenance Ltd
- Company number
- 11393668
- Incorporated
- 1 Jun 20188 years trading
- Registered office
- Basement, 180 Shirland Road, London, W9 3JE
- Nature of business
- Plumbing, heat and air-conditioning installation; Other specialised construction activities n.e.c.; Other service activities n.e.c.
Smart Heating Maintenance Ltd is a 8-year-old private limited company registered in London, company number 11393668, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 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 £32K (+44.1%) on the year before, to £103K.
- Net assets rose in 6 of 7 year-on-year comparisons on record.
- Current assets of £389K against £308K owed within a year: 1.3 times cover.
- 8 employees on average during the year.
- Balance sheets on record for 8 years, 2019 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £103K | £187K | £389K | £308K | 8 |
| 31 Mar 2025 | £72K | £160K | £351K | £265K | 8 |
| 31 Mar 2024 | £44K | £95K | £314K | £208K | 8 |
| 31 Mar 2023 | £42K | £167K | £200K | £176K | 8 |
| 31 Mar 2022 | £34K | £148K | £207K | £195K | 7 |
| 31 Mar 2021 | £153K | £239K | £295K | £163K | 6 |
| 31 Mar 2020 | £97K | £184K | £191K | £126K | 4 |
| 31 Mar 2019 | £56K | £116K | £136K | £115K | 3 |
Where Smart Heating Maintenance Ltd is registered
The registered office is in London (W9), in the Westminster local authority area, London. Show W9 3JE on a map.
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- Luxe Property Estate LtdFinishing trades
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What happens if Smart Heating Maintenance 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11393668
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 June 2018 (8 years ago)
- Registered office
- Basement, 180 Shirland Road, London, W9 3JE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other specialised construction activities n.e.c. (SIC 43999)
Other service activities n.e.c. (SIC 96090) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 16 March 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 London
Other active plumbing and heating companies registered in London.
- Smart Tech Ac Limited2020
- Smartz Global Ltd2025
- SMH Gas Services Ltd2020
- Smith Adaptations NW Limited2025
- Smith Mechanical Ltd2026
- Smith Plumbing, Heating & Heatpumps Ltd2026
- SMT Plumbing & Heating Ltd2016
- Snap Fix Plumbing Ltd2025
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Smart Heating Maintenance Ltd's accounts due?
Smart Heating Maintenance Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Smart Heating Maintenance Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Smart Heating Maintenance Ltd still trading?
Smart Heating Maintenance 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 Smart Heating Maintenance Ltd do?
Smart Heating Maintenance Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other specialised construction activities n.e.c. (SIC 43999); Other service activities n.e.c. (SIC 96090).
How old is Smart Heating Maintenance Ltd?
Smart Heating Maintenance Ltd was incorporated on 1 June 2018, 8 years ago.
What is the penalty if Smart Heating Maintenance 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 Smart Heating Maintenance 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.