- Companies
- Specialist contractors
- Stanmore
- Williams Installations Limited
Williams Installations Limited
- Company number
- 07431123
- Incorporated
- 5 Nov 201015 years trading
- Registered office
- 2 Mountside, Stanmore, Middlesex, HA7 2DT
- Nature of business
- Other specialised construction activities n.e.c.
Williams Installations Limited is a 15-year-old private limited company registered in Stanmore, company number 07431123, one of 90 specialist construction companies in Stanmore. 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 up £365 (+9.7%) on the year before, to -£3,394.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £43K against £16K owed within a year: 2.7 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 | -£3,394 | £21K | £43K | £16K | 1 |
| 31 Mar 2024 | -£3,759 | £23K | £52K | £21K | 1 |
| 31 Mar 2023 | -£12K | £25K | £49K | £24K | 1 |
| 31 Mar 2022 | -£15K | £36K | £52K | £24K | 1 |
| 31 Mar 2021 | -£8,114 | £36K | £101K | £66K | 1 |
| 31 Mar 2020 | -£12K | £13K | £35K | £47K | 1 |
| 31 Mar 2019 | £3,422 | £36K | £51K | £48K | 2 |
| 31 Mar 2018 | £1,660 | £23K | £40K | £38K | 2 |
| 31 Mar 2017 | -£3,872 | £19K | £55K | £58K | 2 |
| 31 Mar 2016 | -£28K | £7,344 | £58K | £87K |
Who runs and owns Williams Installations Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| G*** W*** | Director | Feb 2011 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| G*** C*** | Director | Nov 2010 | Nov 2010 |
| J*** W*** | Director | Nov 2013 | Jun 2019 |
| J*** W*** | Director | Nov 2010 | Feb 2011 |
Person with significant control
Where Williams Installations Limited is registered
The registered office is in Stanmore (HA7), in the Harrow local authority area, London. Show HA7 2DT on a map.
Other trade companies in HA7
- Vatra Developments LtdBuilders
- Air and Waves LtdPlumbers and heating engineers
- R & R Building Services LtdFinishing trades
- Berculean BBV Ltd LtdBuilders
- Velorent LtdMotor traders
- Autex LtdMechanics and garages
- TH Motorcycles LtdMotor traders
- Ady Painting and Decorating LtdInstallers
Shared registered office
93 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 Williams Installations 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
- 07431123
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 November 2010 (15 years ago)
- Registered office
- 2 Mountside, Stanmore, Middlesex, HA7 2DT
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 5 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Stanmore
Other active specialist construction companies registered in Stanmore.
- X Facilities Group Limited2024
- A & J Keane Construction Ltd2009
- Aac Solution Ltd2022
- Acdl Limited2018
- Active Sports Construction Ltd2018
- Adc Building Services Limited2016
- Ady & Sons Group Ltd2025
- Alex Donici Ltd2014
All specialist construction companies in Stanmore · All trades in Stanmore · Specialist contractors across the UK
Frequently asked questions
When are Williams Installations Limited's accounts due?
Williams Installations Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Williams Installations 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 Williams Installations Limited still trading?
Williams Installations 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 Williams Installations Limited do?
Williams Installations Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Williams Installations Limited?
Williams Installations Limited was incorporated on 5 November 2010, 15 years ago.
Who runs Williams Installations Limited?
Williams Installations Limited has 1 active director, the longest-serving appointed in Feb 2011. Their names and service addresses are on the Companies House register.
Who owns Williams Installations Limited?
One person or company has significant control of Williams Installations Limited: an individual (owns 75% or more of the shares).
What is the penalty if Williams Installations 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 Williams Installations 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.