- Companies
- Civil engineering
- Alton
- Bonum Construction Limited
Bonum Construction Limited
- Company number
- 06381416
- Incorporated
- 25 Sep 200719 years trading
- Registered office
- Market House, 21 Lenten Street, Alton, Hampshire, GU34 1HG
- Nature of business
- Construction of other civil engineering projects n.e.c.
Bonum Construction Limited is a 19-year-old private limited company registered in Alton, company number 06381416, one of 12 civil engineering contractors in Alton. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £2,975 (-8.4%) on the year before, to £32K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £76K against £47K owed within a year: 1.6 times cover.
- 1 employee 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £32K | £7,318 | £76K | £47K | 1 |
| 31 Mar 2024 | £35K | £13K | £82K | £50K | 1 |
| 31 Mar 2023 | £34K | £12K | £82K | £51K | 1 |
| 31 Mar 2022 | £27K | £7,339 | £65K | £42K | 1 |
| 31 Mar 2021 | £26K | £13K | £60K | £39K | 1 |
| 31 Mar 2020 | £18K | £27K | £56K | £45K | 1 |
| 31 Mar 2019 | £16K | £27K | £40K | £32K | 1 |
| 31 Mar 2018 | £25K | £20K | £46K | £32K | 1 |
| 31 Mar 2017 | £20K | £13K | £32K | £27K | 1 |
| 31 Mar 2016 | £15K | £15K | £32K | £25K |
Where Bonum Construction Limited is registered
The registered office is in Alton (GU34), in the East Hampshire local authority area, South East. Show GU34 1HG on a map.
Other trade companies in GU34
- Selborne Oak LtdBuilders
- Road & Acre LtdMotor traders
- S Charlton & Sons LimitedFinishing trades
- Buoyansea LtdMachinery repair and installation
- Ajs Design & Build LimitedJoiners and carpenters
- Inca Road Sales LimitedMechanics and garages
- Alton Valeting LtdCleaning companies
- Ab Maintain LimitedMachinery repair and installation
Shared registered office
50 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 Bonum Construction 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 06381416
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2007 (19 years ago)
- Registered office
- Market House, 21 Lenten Street, Alton, Hampshire, GU34 1HG
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 25 September 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 Alton
Other active civil engineering contractors registered in Alton.
- Ebbo Civils Limited2016
- Fastrack Fibre Limited2021
- Fiw Contracting Limited2023
- Hanevo Ltd2012
- Marina & Port Services Ltd1983
- Marina Technical Services Limited1989
- McCaffery Construction Limited1999
- Moulsford Limited1997
All civil engineering contractors in Alton · All trades in Alton · Civil engineering across the UK
Frequently asked questions
When are Bonum Construction Limited's accounts due?
Bonum Construction Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Bonum Construction Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Bonum Construction Limited still trading?
Bonum Construction Limited is listed as active on the Companies House register (checked 12 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 Bonum Construction Limited do?
Bonum Construction Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Bonum Construction Limited?
Bonum Construction Limited was incorporated on 25 September 2007, 19 years ago.
What is the penalty if Bonum Construction 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 Bonum Construction Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.