- Companies
- Plumbers and heating engineers
- Thurso
- Rdi Renewables Limited
Rdi Renewables Limited
- Company number
- SC432162
- Incorporated
- 10 Sep 201214 years trading
- Registered office
- Unit 4B, Ormlie Industrial Estate, Thurso, Caithness, KW14 7QU
- Nature of business
- Plumbing, heat and air-conditioning installation; Other construction installation
Rdi Renewables Limited is a 14-year-old private limited company registered in Thurso, company number SC432162, one of 8 plumbing and heating companies in Thurso. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £158K (+45.1%) on the year before, to £510K.
- Net assets rose in 9 of 9 year-on-year comparisons on record.
- Current assets of £595K against £377K owed within a year: 1.6 times cover.
- 14 employees on average, up from 10 the year before.
- 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 Sep 2025 | £510K | £356K | £595K | £377K | 14 |
| 30 Sep 2024 | £351K | £280K | £503K | £366K | 10 |
| 30 Sep 2023 | £330K | £335K | £608K | £350K | 8 |
| 30 Sep 2022 | £272K | £219K | £358K | £170K | 7 |
| 30 Sep 2021 | £229K | £183K | £322K | £154K | 7 |
| 30 Sep 2020 | £193K | £102K | £236K | £121K | 7 |
| 30 Sep 2019 | £169K | £88K | £278K | £182K | 6 |
| 30 Sep 2018 | £143K | £107K | £223K | £133K | 6 |
| 30 Sep 2017 | £120K | £197K | £358K | £296K | 3 |
| 30 Sep 2016 | £108K | £102K | £157K | £84K |
Public contracts won
Rdi Renewables Limited has 2 public sector contract awards on record; the ones with their own published value total £36K, from 2025 to 2026. Source: Contracts Finder and Find a Tender award notices. For 1 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. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Nuclear Restoration Services Limited1 award
- The Highland Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Nuclear Restoration Services Limited | Dounreay Fast Reactor Heating Upgrade Design | £36K | 16 Jan 2026 |
| The Highland Council | Energy Efficiency Framework | Ceiling, not shown | 16 May 2025 |
Where Rdi Renewables Limited is registered
The registered office is in Thurso (KW14), in the Highland local authority area, Scotland. Show KW14 7QU on a map.
Other trade companies in KW14
- M.A.S Mechanical Services LtdMechanics and garages
- Oas Scaffolding Services LtdScaffolders
- Ran Mac Safety Solutions LtdSpecialist contractors
- Macleod Scaffolding LtdScaffolders
- George Macgregor LtdSpecialist contractors
- C&KC Services LtdScaffolders
- Grid Energy Services LtdCivil engineering
- Pure Glass 4U LtdCleaning companies
What happens if Rdi Renewables 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- SC432162
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 September 2012 (14 years ago)
- Registered office
- Unit 4B, Ormlie Industrial Estate, Thurso, Caithness, KW14 7QU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290) - Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 10 September 2026
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 Thurso
Other active plumbing and heating companies registered in Thurso.
- Simpson & Oag Ltd2012
- A9 Plumbing Limited2020
- Anderson Refrigeration Ltd2025
- North Coast P&H Ltd2023
- North West Highlands Plumbing Services Limited2014
- Orbell Property Management Ltd2018
- Precision Plumbing & Heating Thurso Ltd2020
All plumbing and heating companies in Thurso · All trades in Thurso · Plumbers and heating engineers across the UK
Frequently asked questions
When are Rdi Renewables Limited's accounts due?
Rdi Renewables Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Rdi Renewables Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Rdi Renewables Limited still trading?
Rdi Renewables 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 Rdi Renewables Limited do?
Rdi Renewables Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290).
How old is Rdi Renewables Limited?
Rdi Renewables Limited was incorporated on 10 September 2012, 14 years ago.
Has Rdi Renewables Limited won public sector contracts?
Yes. Rdi Renewables Limited has 2 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £36K), most recently from Nuclear Restoration Services Limited.
What is the penalty if Rdi Renewables 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 Rdi Renewables 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.