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- Civil engineering
- Redruth
- United Downs Geothermal Limited
Company profile · Civil engineering
United Downs Geothermal Limited
United Downs Geothermal Limited is a 9-year-old private limited company registered in Redruth, company number 10868073, one of 10 civil engineering contractors in Redruth. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 December 2025, as filed at Companies House.
United Downs Geothermal Limited over the years
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 £504K (+3.9%) on the year before, to £14M.
- Net assets rose in 2 of 7 year-on-year comparisons on record.
- Current assets of £38K against £1.5M owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £14M | £21K | £38K | £1.5M | 0 |
| 31 Dec 2024 | £13M | £1.3M | £13M | £156K | 0 |
| 31 Dec 2023 | £14M | £1.6M | £14M | £93K | 0 |
| 31 Dec 2022 | -£549K | £465 | £2.9M | £23K | 0 |
| 31 Dec 2021 | -£94K | £3,167 | £2.9M | £0 | 0 |
| 31 Dec 2020 | -£70K | £52 | £2.9M | £12K | 0 |
| 31 Dec 2019 | £100 | ||||
| 31 Jul 2018 | £50K |
Where United Downs Geothermal Limited is registered
The registered office is in Redruth (TR16), in the Cornwall local authority area, South West. Show TR16 5HY on a map.
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Also registered at this address
1 other company uses the same registered office as United Downs Geothermal Limited.
- Geogen LimitedCivil engineering
What happens if United Downs Geothermal 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 10868073
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 July 2017 (9 years ago)
- Registered office
- United Downs Industrial Estate, ST Day, Redruth, Cornwall, TR16 5HY
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 16 July 2026
- Charges (mortgages)
- 1 outstanding of 2 registered
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 Redruth
Other active civil engineering contractors registered in Redruth.
- Westaway Developments (Portreath) Limited2006
- Chillflow Solutions Limited2006
- Concrete & Reinforcement Solutions Ltd2024
- Geogen Limited2021
- Lockley Civils Ltd2015
- Meltec Ltd2023
- R Civils & Surfacing Ltd2026
- Saxton Drilling Limited1967
All civil engineering contractors in Redruth · All trades in Redruth · Civil engineering across the UK
Frequently asked questions
When are United Downs Geothermal Limited's accounts due?
United Downs Geothermal Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is United Downs Geothermal Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is United Downs Geothermal Limited still trading?
United Downs Geothermal 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 United Downs Geothermal Limited do?
United Downs Geothermal Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is United Downs Geothermal Limited?
United Downs Geothermal Limited was incorporated on 17 July 2017, 9 years ago.
What is the penalty if United Downs Geothermal 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 United Downs Geothermal 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.