- Companies
- Plumbers and heating engineers
- Swansea
- Asw Energy Services Limited
Asw Energy Services Limited
- Company number
- 11986575
- Incorporated
- 9 May 20197 years trading
- Registered office
- Mha House Charter Court, Phoenix Way, Swansea Enterprise Park, Swansea, SA7 9FS
- Nature of business
- Plumbing, heat and air-conditioning installation
Asw Energy Services Limited is a 7-year-old private limited company registered in Swansea, company number 11986575, one of 148 plumbing and heating companies in Swansea. Its next accounts are due at Companies House on 28 March 2027, and the CT600 for the period to 28 June 2026 is due at HMRC on 28 June 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 down £22K (-430.5%) on the year before, to -£27K.
- Net assets rose in 1 of 5 year-on-year comparisons on record.
- Current assets of £666 against £27K owed within a year: 0.0 times cover.
- 13 employees on average, up from 12 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Jun 2025 | -£27K | £666 | £27K | 13 | |
| 28 Jun 2024 | -£5,014 | £89K | £94K | 12 | |
| 28 Jun 2023 | -£4,621 | £87K | £92K | 10 | |
| 28 Jun 2022 | £54 | £141K | £141K | 7 | |
| 30 Jun 2021 | -£21K | £218K | £239K | 7 | |
| 30 Jun 2020 | -£19K | £173K | £192K | 2 |
Where Asw Energy Services Limited is registered
The registered office is in Swansea (SA7), in the Swansea local authority area, Wales. Show SA7 9FS on a map.
Other trade companies in SA7
- Foundry & Co Construction LtdBuilders
- Pops Power Solutions LtdElectricians
- Perfect Roofing and Home Maintenance LimitedRoofers
- Eveo Engineering LtdElectricians
- Performance Bunker Liner LimitedSpecialist contractors
- Swan Roofing LimitedRoofers
- Air Conditioning & Heat Pumps LimitedPlumbers and heating engineers
- Ogm Pristine Cleaning LtdCleaning companies
Also registered at this address
9 other companies use the same registered office as Asw Energy Services Limited.
- Arthur Reginald Construction LimitedInstallers
- Elev8 Scaffolding (South Wales) LimitedScaffolders
- Groesffordd Homes LtdBuilders
- JC Levels LimitedInstallers
- JLR Construction & Engineering LtdBuilders
- LMS (Wales) LimitedSpecialist contractors
- Peter Nicholas & Sons LtdRoofers
- R Powell Properties LtdProperty developers
- South Wales Diesel Specialists LimitedMechanics and garages
What happens if Asw Energy Services 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 28 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 29 Mar 2027 to 28 Apr 2027 | £150 |
| 1 to 3 months late | 29 Apr 2027 to 28 Jun 2027 | £375 |
| 3 to 6 months late | 29 Jun 2027 to 28 Sep 2027 | £750 |
| More than 6 months late | From 29 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Jun 2027 | £200 |
| 3 months late | 28 Sep 2027 | another £200 |
| 6 months late | 28 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Jun 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
- 11986575
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 May 2019 (7 years ago)
- Registered office
- Mha House Charter Court, Phoenix Way, Swansea Enterprise Park, Swansea, SA7 9FS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 28 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 June 2025
- Last confirmation statement
- 2 June 2026
- Previous names
- Asw Lloyd Energy Services Ltd (until 24 Jan 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 Swansea
Other active plumbing and heating companies registered in Swansea.
- Blue Jays Home Services Ltd2026
- Brooksmith Air Limited2026
- Ca Jones & Son Limited2006
- Cambriani Gas Ltd2019
- Cambriani Plumbing & Heating Ltd2021
- Cannon Heating Services Ltd2007
- Cityflow Plumbing and Heating Limited2026
- Clima Cooling Solutions Ltd2026
All plumbing and heating companies in Swansea · All trades in Swansea · Plumbers and heating engineers across the UK
Frequently asked questions
When are Asw Energy Services Limited's accounts due?
Asw Energy Services Limited's next accounts are due at Companies House by 28 March 2027 (in 166 days), covering the period to 28 June 2026.
When is Asw Energy Services Limited's CT600 due?
The CT600 for the period to 28 June 2026 is due at HMRC by 28 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 29 March 2027.
Is Asw Energy Services Limited still trading?
Asw Energy Services 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 Asw Energy Services Limited do?
Asw Energy Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Asw Energy Services Limited?
Asw Energy Services Limited was incorporated on 9 May 2019, 7 years ago.
What is the penalty if Asw Energy Services 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 Asw Energy Services 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.