- Companies
- Electricians
- Proinstall Av Limited
Proinstall Av Limited
- Company number
- 08405983
- Incorporated
- 18 Feb 201313 years trading
- Registered office
- 3RD Floor, 45 Albemarle Street, Mayfair, W1S 4JL
- Nature of business
- Electrical installation
Proinstall Av Limited is a 13-year-old private limited company registered in Mayfair, company number 08405983, one of the UK's electrical contractors. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 up £56K (+20.6%) on the year before, to £329K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £496K against £411K owed within a year: 1.2 times cover.
- 4 employees 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £329K | £496K | £411K | 4 | |
| 29 Feb 2024 | £272K | £614K | £470K | 4 | |
| 28 Feb 2023 | £223K | £219K | £45K | 4 | |
| 28 Feb 2022 | £122K | £356K | £133K | 4 | |
| 28 Feb 2021 | £20K | £218K | £30K | 4 | |
| 29 Feb 2020 | £53K | £65K | £72K | £28K | 4 |
| 28 Feb 2019 | £47K | £3,875 | £95K | £56K | |
| 28 Feb 2018 | £43K | £68K | £20K | ||
| 28 Feb 2017 | £31K | £67K | £39K | ||
| 29 Feb 2016 | £22K | £19K | £29K | £9,940 |
Where Proinstall Av Limited is registered
The registered office is in Mayfair (W1S), in the Westminster local authority area, London. Show W1S 4JL on a map.
Other trade companies in W1S
- Alderborne LimitedSpecialist contractors
- Gtstore LtdMotor traders
- Imperial Roofcraft LtdRoofers
- Service Robots Group LtdFacilities management
- Bluerock Infrastructure LtdBuilders
- Kaivaro Projects LtdBuilders
- Solar Property 45 LtdProperty developers
- Crown Crest Roofing and Building Solutions LtdRoofers
Also registered at this address
17 other companies use the same registered office as Proinstall Av Limited.
- Alderborne LimitedSpecialist contractors
- Ascot Investment Partners 2 LtdProperty developers
- Bees Build LtdBuilders
- Caspian Asset Management LimitedProperty developers
- Floorless Contracts LimitedFinishing trades
- Frankabode Property Group LtdProperty developers
- Galo Holdings LimitedBuilders
- Gtstore LtdMotor traders
- Igws Integrated Services LtdMotor traders
- Lansmere Holdings LtdProperty developers
- London City Drains LtdPlumbers and heating engineers
- London Mep Masters LtdProperty developers
- Pro Install M & E LimitedElectricians
- Sys Maintenance LtdFacilities management
- V&S Construction LtdBuilders
- West 1 Fire and Compliance LimitedInstallers
- WH Davies LimitedElectricians
What happens if Proinstall Av 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 08405983
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 February 2013 (13 years ago)
- Registered office
- 3RD Floor, 45 Albemarle Street, Mayfair, W1S 4JL
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 18 February 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies
Other active electrical contractors.
Frequently asked questions
When are Proinstall Av Limited's accounts due?
Proinstall Av Limited's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Proinstall Av Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Proinstall Av Limited still trading?
Proinstall Av Limited 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 Proinstall Av Limited do?
Proinstall Av Limited is registered under Electrical installation (SIC 43210).
How old is Proinstall Av Limited?
Proinstall Av Limited was incorporated on 18 February 2013, 13 years ago.
What is the penalty if Proinstall Av 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 Proinstall Av Limited 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.