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- Prostoo Ltd
Company profile · Builders
Prostoo Ltd
Prostoo Ltd is a 5-year-old private limited company registered in Southampton, company number 13026950, one of 491 building contractors in Southampton. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
Prostoo Ltd over the years
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 £1,083 (+12.9%) on the year before, to £9,489.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £12K against £2,365 owed within a year: 5.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £9,489 | £12K | £2,365 | 1 | |
| 30 Nov 2024 | £8,406 | £9,932 | £1,526 | 1 | |
| 30 Nov 2023 | £6,903 | £21K | £27K | £20K | 1 |
| 30 Nov 2022 | -£27K | £20K | £22K | £0 | 1 |
| 30 Nov 2021 | £180 | £1,681 | £10K | £8,299 | 1 |
Where Prostoo Ltd is registered
The registered office is in Southampton (SO19), in the Southampton local authority area, South East. Show SO19 9PE on a map.
Other trade companies in SO19
- 4LK Cleaning Company LtdCleaning companies
- Nest Path Properties LimitedBuilders
- Dautaj Groundworks LtdBuilders
- Craftline Carpentry Services LtdJoiners and carpenters
- Agape-Wise LimitedCleaning companies
- Cool Enterprises LtdPlumbers and heating engineers
- Jmac Carpentry & Building LtdPlasterers
- Auto Motive Dismantling - Amd LtdMotor traders
What happens if Prostoo 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 13026950
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 November 2020 (5 years ago)
- Registered office
- 28 Bevan Close, Southampton, SO19 9PE
- Nature of business
- Construction of commercial buildings (SIC 41201)
Maintenance and repair of motor vehicles (SIC 45200)
Freight transport by road (SIC 49410) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 14 July 2026
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 Southampton
Other active building contractors registered in Southampton.
- PSH Buildworks Ltd2026
- Pure Renovation and Design Ltd2023
- PW Construction Ltd2025
- PWH Building Limited2009
- R F E Maintenance Ltd.2003
- R.A.Redman Limited2008
- R.J. Wilson Steel Erection Ltd1999
- R.K Dry Lining Ltd2012
All building contractors in Southampton · All trades in Southampton · Builders across the UK
Frequently asked questions
When are Prostoo Ltd's accounts due?
Prostoo Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Prostoo Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Prostoo Ltd still trading?
Prostoo 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 Prostoo Ltd do?
Prostoo Ltd is registered under Construction of commercial buildings (SIC 41201); Maintenance and repair of motor vehicles (SIC 45200); Freight transport by road (SIC 49410).
How old is Prostoo Ltd?
Prostoo Ltd was incorporated on 17 November 2020, 5 years ago.
What is the penalty if Prostoo 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 Prostoo Ltd on Companies House for filed documents, officers and the full history.
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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.