- Companies
- Specialist contractors
- London
- Deon Energy Ltd
Deon Energy Ltd
- Company number
- 09017122
- Incorporated
- 29 Apr 201412 years trading
- Registered office
- 35 Grafton Way, London, W1T 5DB
- Nature of business
- Other specialised construction activities n.e.c.
Deon Energy Ltd is a 12-year-old private limited company registered in London, company number 09017122, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 £71K (-14.9%) on the year before, to £406K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £600K against £216K owed within a year: 2.8 times cover.
- 3 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 Apr 2025 | £406K | £163K | £600K | £216K | 3 |
| 30 Apr 2024 | £477K | £182K | £747K | £297K | 3 |
| 30 Apr 2023 | £526K | £182K | £721K | £227K | 5 |
| 30 Apr 2022 | £615K | £227K | £926K | £348K | 6 |
| 30 Apr 2021 | £772K | £354K | £1.1M | £337K | 14 |
| 30 Apr 2020 | £831K | £567K | £1.1M | £277K | 24 |
| 30 Apr 2019 | £792K | £579K | £1M | £285K | 15 |
| 30 Apr 2018 | £450K | £187K | £654K | £256K | 15 |
| 30 Apr 2017 | £180K | £321K | £520K | £353K | 15 |
| 30 Apr 2016 | £327 | £46K | £165K | £180K |
Where Deon Energy Ltd is registered
The registered office is in London (W1T), in the Camden local authority area, London. Show W1T 5DB on a map.
Other trade companies in W1T
- Preschools Cleaning Company LtdCleaning companies
- Northheat Plumbing & Heating LtdPlumbers and heating engineers
- Leuk Lift Engineering UK LtdMachinery repair and installation
- Az Maintenance Services LimitedFinishing trades
- Braintree Property Service LtdBuilders
- Nona Construction & Retrofit LtdBuilders
- Denvav LimitedBuilders
- Marshall Roofing Services LtdRoofers
Shared registered office
73 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 Deon Energy 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 09017122
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 April 2014 (12 years ago)
- Registered office
- 35 Grafton Way, London, W1T 5DB
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 11 July 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Derisk (UK) Holdings Limited2019
- Derreeney Construction Services Ltd2023
- Desert Solar Power Ltd2016
- Design & Building Firm Ltd2015
- Design 121 Limited2017
- Design Builders Ltd2021
- Designspacelondon Limited2005
- Destination Zero Limited2026
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Deon Energy Ltd's accounts due?
Deon Energy Ltd's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Deon Energy Ltd's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Deon Energy Ltd still trading?
Deon Energy 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 Deon Energy Ltd do?
Deon Energy Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Deon Energy Ltd?
Deon Energy Ltd was incorporated on 29 April 2014, 12 years ago.
What is the penalty if Deon Energy 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 Deon Energy 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.