- Companies
- Builders
- Basingstoke
- Proof Construction Limited
Proof Construction Limited
- Company number
- 12227097
- Incorporated
- 25 Sep 20197 years trading
- Registered office
- Coral Apartments, 6A London Street, Flat 1, Basingstoke, RG21 7NU
- Nature of business
- Construction of domestic buildings
Proof Construction Limited is a 7-year-old private limited company registered in Basingstoke, company number 12227097, one of 124 building contractors in Basingstoke. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 Proof Construction LimitedOr 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 £3,395 (-52.9%) on the year before, to £3,028.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £3,028 | £4,006 | £978 | 1 | |
| 31 Aug 2024 | £6,423 | £16K | £9,350 | 1 | |
| 31 Aug 2023 | £7,398 | £16K | £8,246 | 1 | |
| 31 Aug 2022 | £3,467 | £17K | £2,728 | 1 | |
| 31 Aug 2021 | £433 | £47K | £6,541 | 1 | |
| 31 Aug 2020 | £900 | £8,695 | £7,795 | 1 |
Where Proof Construction Limited is registered
The registered office is in Basingstoke (RG21), in the Basingstoke and Deane local authority area, South East. Show RG21 7NU on a map.
Other trade companies in RG21
- J.Lee Studios LtdMechanics and garages
- Jflow Heating LtdPlumbers and heating engineers
- Irinacleaning LtdCleaning companies
- Summit Auto Services LtdMotor traders
- Aza General LtdBuilders
- Anchor Access Group LimitedSpecialist contractors
- Hci Homes LtdFinishing trades
- V F Gasha LimitedProperty developers
What happens if Proof 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 12227097
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2019 (7 years ago)
- Registered office
- Coral Apartments, 6A London Street, Flat 1, Basingstoke, RG21 7NU
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 24 September 2025
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 Basingstoke
Other active building contractors registered in Basingstoke.
- PWK Solutions Ltd2013
- Pymms Limited2018
- Qualitop Engineering and Projects Ltd2026
- R&J Renovations Ltd2022
- Red Kite Carpentry Limited2013
- Ronclad Ltd2025
- RTT Titanbuild Ltd2026
- SD1912 Ltd2020
All building contractors in Basingstoke · All trades in Basingstoke · Builders across the UK
Frequently asked questions
When are Proof Construction Limited's accounts due?
Proof Construction Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Proof Construction Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Proof Construction Limited still trading?
Proof 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 Proof Construction Limited do?
Proof Construction Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Proof Construction Limited?
Proof Construction Limited was incorporated on 25 September 2019, 7 years ago.
What is the penalty if Proof 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 Proof 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.