- Companies
- Civil engineering
- Chelmsford
- Aberthaw Energy Limited
Aberthaw Energy Limited
- Company number
- 13334556
- Incorporated
- 14 Apr 20215 years trading
- Registered office
- 2 Hopkins Mead, Chelmsford, CM2 6SS
- Nature of business
- Construction of utility projects for electricity and telecommunications
Aberthaw Energy Limited is a 5-year-old private limited company registered in Chelmsford, company number 13334556, one of 63 civil engineering contractors in Chelmsford. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 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 £294K (-205.5%) on the year before, to -£437K.
- Net assets rose in 1 of 4 year-on-year comparisons on record.
- Current assets of £35K against £5,200 owed within a year: 6.8 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£437K | £35K | £5,200 | 4 | |
| 30 Jun 2024 | -£143K | £25K | £0 | 4 | |
| 30 Jun 2023 | -£111K | £61K | £4,338 | 4 | |
| 30 Jun 2022 | -£45K | £16K | 2 | ||
| 30 Jun 2021 | -£72K | £14K | 1 |
Where Aberthaw Energy Limited is registered
The registered office is in Chelmsford (CM2), in the Chelmsford local authority area, East of England. Show CM2 6SS on a map.
Other trade companies in CM2
- Ilw Construction LtdBuilders
- HRK 01 LtdBuilders
- Anglian Air & Power LtdElectricians
- DCC 3D LtdSpecialist contractors
- DCC Sustain LtdSpecialist contractors
- Dion Electrical LtdElectricians
- Highway Valeting Centre LtdCleaning companies
- Arkstone Developments LimitedProperty developers
Also registered at this address
6 other companies use the same registered office as Aberthaw Energy Limited.
- Figure4 LimitedCivil engineering
- Kirkby Homes Developments LimitedBuilders
- MB Heating Engineers LimitedPlumbers and heating engineers
- Mosedale Energy LimitedCivil engineering
- Oakbrook Moorings LimitedSpecialist contractors
- Tupa Energy LimitedProperty developers
What happens if Aberthaw Energy 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 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
- 13334556
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 April 2021 (5 years ago)
- Registered office
- 2 Hopkins Mead, Chelmsford, CM2 6SS
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 23 January 2026
- Previous names
- Elin Efa Limited (until 6 May 2021)
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Chelmsford
Other active civil engineering contractors registered in Chelmsford.
- Andica International Limited2005
- Andun Engineering Consultants Ltd2019
- Apb Solutions Ltd2023
- Ardenrich Engineering Limited2026
- Atr Maintenance Limited2015
- Automotive Mechanical Services Limited2012
- B Walsh Solutions Limited2007
- Bidston Management Services Limited2012
All civil engineering contractors in Chelmsford · All trades in Chelmsford · Civil engineering across the UK
Frequently asked questions
When are Aberthaw Energy Limited's accounts due?
Aberthaw Energy Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Aberthaw Energy Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Aberthaw Energy Limited still trading?
Aberthaw Energy 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 Aberthaw Energy Limited do?
Aberthaw Energy Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Aberthaw Energy Limited?
Aberthaw Energy Limited was incorporated on 14 April 2021, 5 years ago.
What is the penalty if Aberthaw Energy 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 Aberthaw Energy 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.