- Companies
- Plumbers and heating engineers
- Hemel Hempstead
- Smart Sustainable Heating Ltd
Smart Sustainable Heating Ltd
- Company number
- 09880127
- Incorporated
- 19 Nov 201510 years trading
- Registered office
- 1C Amberside, Wood Lane, Hemel Hempstead, Hertfordshire, HP2 4TP
- Nature of business
- Plumbing, heat and air-conditioning installation; Other professional, scientific and technical activities n.e.c.
Smart Sustainable Heating Ltd is a 10-year-old private limited company registered in Hemel Hempstead, company number 09880127, one of 89 plumbing and heating companies in Hemel Hempstead. 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 £5,225 (+104%) on the year before, to £200.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £17K against £18K owed within a year: 0.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £200 | £9,271 | £17K | £18K | 2 |
| 30 Nov 2024 | -£5,025 | £40 | £13K | £17K | 2 |
| 30 Nov 2023 | £6,764 | £4,285 | £18K | £7,204 | 2 |
| 30 Nov 2022 | £15K | £28K | £50K | £30K | 2 |
| 30 Nov 2021 | £207 | £21K | £28K | £20K | 2 |
| 30 Nov 2020 | £45 | £38K | £48K | £28K | 2 |
| 30 Nov 2019 | £1,818 | £3,591 | £13K | £11K | 2 |
| 30 Nov 2018 | £2,733 | £0 | £9,019 | £6,407 | 2 |
| 30 Nov 2017 | £251 | £1,052 | £9,306 | £9,055 | 2 |
| 30 Nov 2016 | -£9,381 | £12K |
Where Smart Sustainable Heating Ltd is registered
The registered office is in Hemel Hempstead (HP2), in the Dacorum local authority area, East of England. Show HP2 4TP on a map.
Other trade companies in HP2
- Prime Carpet Cleaning Experts LtdCleaning companies
- House to Home Builders LtdBuilders
- Gabriel Curic LtdCivil engineering
- Morya Holdings LtdProperty developers
- Construction by Nick LtdSpecialist contractors
- Ayzat Cleaning Solutions LimitedCleaning companies
- Thompsons Prowash LtdCleaning companies
- Herts Paving & Landscapes LtdSpecialist contractors
Shared registered office
29 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 Smart Sustainable 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
- 09880127
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 November 2015 (10 years ago)
- Registered office
- 1C Amberside, Wood Lane, Hemel Hempstead, Hertfordshire, HP2 4TP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 18 November 2025
- Previous names
- K Robinson Plumbing & Heating Ltd (until 9 Apr 2019)
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 Hemel Hempstead
Other active plumbing and heating companies registered in Hemel Hempstead.
- T W Heating Services Ltd2016
- TBP Trades Ltd2026
- TDP Plumbing & Heating Limited2018
- Thermoliv Limited2021
- Total Ability Limited2012
- Townhouse Plumbing & Heating Ltd2017
- True Flame Gas Services Limited2003
- V & F Giddings Property Maintenance Limited2003
All plumbing and heating companies in Hemel Hempstead · All trades in Hemel Hempstead · Plumbers and heating engineers across the UK
Frequently asked questions
When are Smart Sustainable Heating Ltd's accounts due?
Smart Sustainable Heating Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Smart Sustainable 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 Smart Sustainable Heating Ltd still trading?
Smart Sustainable 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 Smart Sustainable Heating Ltd do?
Smart Sustainable Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Smart Sustainable Heating Ltd?
Smart Sustainable Heating Ltd was incorporated on 19 November 2015, 10 years ago.
What is the penalty if Smart Sustainable 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 Smart Sustainable 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.