- Companies
- Plumbers and heating engineers
- Llanelli
- Stellar Energy UK Limited
Stellar Energy UK Limited
- Company number
- 11207319
- Incorporated
- 15 Feb 20188 years trading
- Registered office
- 54 Stepney Street, Llanelli, SA15 3TG
- Nature of business
- Plumbing, heat and air-conditioning installation
Stellar Energy UK Limited is a 8-year-old private limited company registered in Llanelli, company number 11207319, one of 29 plumbing and heating companies in Llanelli. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £609K (+64.9%) on the year before, to £1.5M.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £2.2M against £957K owed within a year: 2.3 times cover.
- 33 employees on average, up from 15 the year before.
- Balance sheets on record for 6 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £1.5M | £1.3M | £2.2M | £957K | 33 |
| 29 Feb 2024 | £938K | £493K | £1.7M | £1M | 15 |
| 28 Feb 2023 | £60K | £149K | £245K | £155K | 16 |
| 28 Feb 2022 | £2,062 | £166K | £233K | £191K | 21 |
| 28 Feb 2020 | £1 | ||||
| 28 Feb 2019 | £1 |
Public contracts won
Stellar Energy UK Limited has 3 public sector contract awards on record; the ones with their own published value total £125K (2026). Source: Contracts Finder and Find a Tender award notices. For 2 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 2 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Bournemouth, Christchurch and Poole Council1 award
- ateb Housing Group Ltd1 award
- Cyngor Sir Ceredigion County Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Bournemouth, Christchurch and Poole Council | BCP council property solar PV and associated system installation | Ceiling, not shown | 2 Jun 2026 |
| ateb Housing Group Ltd | ateb Retrofit Framework | Ceiling, not shown | 14 May 2026 |
| Cyngor Sir Ceredigion County Council | Ceredigion - Rooftop Solar PV's Installation | £125K | 27 Apr 2026 |
Where Stellar Energy UK Limited is registered
The registered office is in Llanelli (SA15), in the Carmarthenshire local authority area, Wales. Show SA15 3TG on a map.
Other trade companies in SA15
- Annesley Street (Llanelli) LtdProperty developers
- A&J Landscapes and Property Maintenance LimitedLandscapers and gardeners
- A.C Electrics Llanelli LtdElectricians
- Blue Lagoon Paving & Patios LtdLandscapers and gardeners
- Gwyn Towns Installations LtdInstallers
- Ozma Developments LtdProperty developers
- Swansea Mobile Boat Engineers LtdMachinery repair and installation
- South Wales Bathrooms and Heating LtdPlumbers and heating engineers
What happens if Stellar Energy UK Limited 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 11207319
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 February 2018 (8 years ago)
- Registered office
- 54 Stepney Street, Llanelli, SA15 3TG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 16 December 2025
- Charges (mortgages)
- 1 outstanding of 2 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 Llanelli
Other active plumbing and heating companies registered in Llanelli.
- Thomas Capital Group Limited2025
- Towy Valley Heating Ltd2016
- Wayne Edwards Plumbing & Gas Ltd2018
- Wayne Lewis Gas Services Limited2003
- Alpha Energy Group Ltd2020
- Asr Heating Group Limited2026
- Best Choice Plumbing Limited2025
- CJ Aga Servicing Ltd2022
All plumbing and heating companies in Llanelli · All trades in Llanelli · Plumbers and heating engineers across the UK
Frequently asked questions
When are Stellar Energy UK Limited's accounts due?
Stellar Energy UK Limited's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Stellar Energy UK Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Stellar Energy UK Limited still trading?
Stellar Energy UK Limited 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 Stellar Energy UK Limited do?
Stellar Energy UK Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Stellar Energy UK Limited?
Stellar Energy UK Limited was incorporated on 15 February 2018, 8 years ago.
Has Stellar Energy UK Limited won public sector contracts?
Yes. Stellar Energy UK Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £125K), most recently from Bournemouth, Christchurch and Poole Council.
What is the penalty if Stellar Energy UK Limited 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 Stellar Energy UK Limited 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.