- Companies
- Property developers
- Slough
- Mario Building Construction Ltd
Mario Building Construction Ltd
- Company number
- 08023343
- Incorporated
- 10 Apr 201214 years trading
- Registered office
- 310 Langley RD, Langley Road, Slough, SL3 8BP
- Nature of business
- Development of building projects
Mario Building Construction Ltd is a 14-year-old private limited company registered in Slough, company number 08023343, one of 316 property development companies in Slough. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Mario Building Construction LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £1,723 (-4.2%) on the year before, to -£42K.
- Net assets rose in 1 of 9 year-on-year comparisons on record.
- 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 |
|---|---|---|---|---|---|
| 30 Apr 2025 | -£42K | -£1,792 | £500 | 1 | |
| 30 Apr 2024 | -£41K | -£569 | -£569 | £0 | 1 |
| 30 Apr 2023 | -£41K | £2,312 | £3,962 | £1,510 | 1 |
| 30 Apr 2022 | -£40K | £2,921 | £7,571 | £1,510 | 1 |
| 30 Apr 2021 | -£40K | £7,109 | £12K | £1,527 | 1 |
| 30 Apr 2020 | £21K | £6,703 | £28K | 1 | |
| 30 Apr 2019 | £27K | £2,223 | £29K | ||
| 30 Apr 2018 | £27K | £4,137 | £31K | ||
| 30 Apr 2017 | -£26K | £8,360 | £34K | ||
| 30 Apr 2016 | £2,375 | £1,049 | £43K | £41K |
Where Mario Building Construction Ltd is registered
The registered office is in Slough (SL3), in the Slough local authority area, South East. Show SL3 8BP on a map.
Other trade companies in SL3
- Tac Design & Build LtdFinishing trades
- G&S Formwork LtdBuilders
- Klenzo LtdCleaning companies
- West London Crown Construction LtdBuilders
- Dahlia Investment Group LimitedProperty developers
- Ekon Electrics LtdElectricians
- R&G Maintenance LtdCleaning companies
- Cornerstone Homes & Estates LtdProperty developers
What happens if Mario Building Construction 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 08023343
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 April 2012 (14 years ago)
- Registered office
- 310 Langley RD, Langley Road, Slough, SL3 8BP
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 5 June 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Slough
Other active property development companies registered in Slough.
- Masonview Homes Ltd2024
- Mattock Lane Ltd2014
- Mavers Properties Ltd2024
- MGK Infra Realty Ltd2022
- Midsouth Investment Ltd2023
- Miradew Limited2011
- MNK Estates (UK) Limited2013
- Mount Everest Scaffolding Ltd2014
All property development companies in Slough · All trades in Slough · Property developers across the UK
Frequently asked questions
When are Mario Building Construction Ltd's accounts due?
Mario Building Construction Ltd's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Mario Building Construction Ltd's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Mario Building Construction Ltd still trading?
Mario Building Construction 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 Mario Building Construction Ltd do?
Mario Building Construction Ltd is registered under Development of building projects (SIC 41100).
How old is Mario Building Construction Ltd?
Mario Building Construction Ltd was incorporated on 10 April 2012, 14 years ago.
What is the penalty if Mario Building Construction 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 Mario Building Construction 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.