- Company number
- 07488658
- Incorporated
- 11 Jan 201115 years trading
- Registered office
- Sidings House Sidings Court, Lakeside, Doncaster, South Yorkshire, DN4 5NU
- Nature of business
- Construction of commercial buildings
Trumax Building Ltd is a 15-year-old private limited company registered in Doncaster, company number 07488658, one of 306 building contractors in Doncaster. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £92K (-75.3%) on the year before, to £30K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £148K against £125K owed within a year: 1.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 31 Jan 2025 | £30K | £5,480 | £148K | £125K | 0 |
| 31 Jan 2024 | £123K | £34K | £231K | £160K | 2 |
| 31 Jan 2023 | £194K | £82K | £279K | £153K | 2 |
| 31 Jan 2022 | £166K | £47K | £246K | £87K | 2 |
| 31 Jan 2021 | £194K | £74K | £300K | £107K | 2 |
| 31 Jan 2020 | £246K | £229K | £353K | £152K | 4 |
| 31 Jan 2019 | £124K | £50K | £255K | £72K | 4 |
| 31 Jan 2018 | £83K | £230K | £170K | ||
| 31 Jan 2017 | £50K | £124K | £102K | ||
| 31 Jan 2016 | £1,576 | £76K | £91K |
Where Trumax Building Ltd is registered
The registered office is in Doncaster (DN4), in the Doncaster local authority area, Yorkshire and The Humber. Show DN4 5NU on a map.
Other trade companies in DN4
- Krishtal Cleaning LtdCleaning companies
- Regional Services & Maintenance LtdElectricians
- Kristan Carr E&M LimitedElectricians
- Brookes Home and Heating LtdBuilders
- 1ST Ground Construction Management Services LtdProperty developers
- Speedy Transport Doncaster LtdMechanics and garages
- Team Clean Group Commercial LtdCleaning companies
- Veridian Guard LtdInstallers
Shared registered office
38 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 Trumax Building 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 07488658
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 January 2011 (15 years ago)
- Registered office
- Sidings House Sidings Court, Lakeside, Doncaster, South Yorkshire, DN4 5NU
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 11 January 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Doncaster
Other active building contractors registered in Doncaster.
- TSS Construction Ltd2021
- Uktrade 2020Ltd Limited2023
- Ulmus Homes Limited2023
- Unique Roofing Contractors Limited2021
- Untold Kitchens&Bedrooms Ltd2026
- Urban I (Blonk Street) Ltd2003
- Varsity Builders Limited2005
- Viking Building & Construction Limited2022
All building contractors in Doncaster · All trades in Doncaster · Builders across the UK
Frequently asked questions
When are Trumax Building Ltd's accounts due?
Trumax Building Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Trumax Building Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Trumax Building Ltd still trading?
Trumax Building 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 Trumax Building Ltd do?
Trumax Building Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is Trumax Building Ltd?
Trumax Building Ltd was incorporated on 11 January 2011, 15 years ago.
What is the penalty if Trumax Building 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 Trumax Building 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.