- Companies
- Civil engineering
- Doncaster
- Ivoltz Limited
Ivoltz Limited
- Company number
- 10579268
- Incorporated
- 24 Jan 20179 years trading
- Registered office
- 3 Railway Court, Ten Pound Walk, Doncaster, DN4 5FB
- Nature of business
- Construction of other civil engineering projects n.e.c.; Electrical installation; Other specialised construction activities n.e.c.
Ivoltz Limited is a 9-year-old private limited company registered in Doncaster, company number 10579268, one of 170 civil engineering contractors in Doncaster. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £19K (-6.1%) on the year before, to £292K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £594K against £320K owed within a year: 1.9 times cover.
- 10 employees on average, up from 9 the year before.
- Balance sheets on record for 9 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £292K | £50K | £594K | £320K | 10 |
| 31 Oct 2024 | £311K | £137K | £427K | £129K | 9 |
| 31 Oct 2023 | £342K | £221K | £596K | £257K | 9 |
| 31 Oct 2022 | £240K | £63K | £441K | £204K | 7 |
| 31 Oct 2021 | £155K | £346K | £174K | 3 | |
| 31 Oct 2020 | £45K | £133K | £46K | 2 | |
| 31 Oct 2019 | £35K | £107K | £78K | ||
| 31 Jan 2019 | £302 | £30K | £40K | ||
| 31 Jan 2018 | £662 | £21K | £22K |
Public contracts won
Ivoltz Limited has one public sector contract award on record; the ones with their own published value total £73K (2022). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Education Training Collective | CA9490 - ETC: Supply and Installation of Renewable and Clean Energy Training Equipment | £73K | 5 Jan 2022 |
Where Ivoltz Limited is registered
The registered office is in Doncaster (DN4), in the Doncaster local authority area, Yorkshire and The Humber. Show DN4 5FB on a map.
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Also registered at this address
16 other companies use the same registered office as Ivoltz Limited.
- Amp5 Contracts LimitedElectricians
- Aqua Chem Environmental LtdCleaning companies
- Ardpoll Installation Services LimitedElectricians
- C B Building Contractors LimitedProperty developers
- CGP Commercials LimitedMotor traders
- CRC Properties LimitedProperty developers
- E H Homes LimitedBuilders
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- Invest Yorkshire LimitedProperty developers
- Kes Air Technology LimitedMotor traders
- Lock and Flow Plumbing and Heating LtdPlumbers and heating engineers
- P H M & C E Consultancy LimitedCivil engineering
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- R M Poole Decorating LimitedPainters and decorators
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What happens if Ivoltz 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 10579268
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 January 2017 (9 years ago)
- Registered office
- 3 Railway Court, Ten Pound Walk, Doncaster, DN4 5FB
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Electrical installation (SIC 43210)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 17 December 2025
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 Doncaster
Other active civil engineering contractors registered in Doncaster.
- J P Excavations Ltd2011
- J.C Highways Ltd2024
- J.K Civils & Drainage Ltd2025
- Jam Fam One Ltd2024
- Jas Civils Ltd2025
- JCM Rail Ltd2025
- JJC Roadways Limited2023
- Johnson & Son Project Management Ltd2025
All civil engineering contractors in Doncaster · All trades in Doncaster · Civil engineering across the UK
Frequently asked questions
When are Ivoltz Limited's accounts due?
Ivoltz Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Ivoltz Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Ivoltz Limited still trading?
Ivoltz 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 Ivoltz Limited do?
Ivoltz Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Electrical installation (SIC 43210); Other specialised construction activities n.e.c. (SIC 43999).
How old is Ivoltz Limited?
Ivoltz Limited was incorporated on 24 January 2017, 9 years ago.
Has Ivoltz Limited won public sector contracts?
Yes. Ivoltz Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £73K), most recently from Education Training Collective.
What is the penalty if Ivoltz 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 Ivoltz 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.