- Company number
- 06829523
- Incorporated
- 25 Feb 200917 years trading
- Registered office
- 50 ST. Martins Approach, Ruislip, HA4 7QQ
- Nature of business
- Construction of commercial buildings
William James Construction Limited is a 17-year-old private limited company registered in Ruislip, company number 06829523, one of 161 building contractors in Ruislip. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £35K (+96.2%) on the year before, to £72K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £144K against £82K owed within a year: 1.7 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £72K | £108K | £144K | £82K | 2 |
| 31 Mar 2025 | £37K | £74K | £94K | £73K | 2 |
| 31 Mar 2024 | £13K | £70K | £74K | £86K | 2 |
| 31 Mar 2023 | £93K | £189K | £191K | £98K | 2 |
| 31 Mar 2022 | £177K | £108K | £396K | £219K | 2 |
| 31 Mar 2021 | £97 | £145K | £107K | 2 | |
| 31 Mar 2020 | £4,382 | £124K | £119K | 2 | |
| 31 Mar 2019 | £1,063 | £23K | £22K | ||
| 31 Mar 2018 | £44K | £209K | £165K | ||
| 30 Mar 2018 | £44K | £209K | £165K |
Where William James Construction Limited is registered
The registered office is in Ruislip (HA4), in the Hillingdon local authority area, London. Show HA4 7QQ on a map.
Other trade companies in HA4
- SSC London LtdGroundworks and demolition
- DCR Industriltdal LtdPainters and decorators
- Katardino Monten for General Contracting and Supplies LtdCivil engineering
- Apex Build & Move LtdBuilders
- Ridgeway Building Contracts LimitedProperty developers
- Azya Farah LtdBuilders
- Howdens Roofing & Guttering LimitedRoofers
- Vetro Glazing LimitedGlaziers
What happens if William James 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 06829523
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 February 2009 (17 years ago)
- Registered office
- 50 ST. Martins Approach, Ruislip, HA4 7QQ
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 13 January 2026
- Previous names
- W J Flynn Limited (until 19 May 2009)
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 Ruislip
Other active building contractors registered in Ruislip.
- WL Builders Ltd2014
- Yari London Construction Ltd2025
- Zet Build Ltd2026
- A S Pannu Ltd2025
- A.C. Building Consultancy Ltd2024
- Aas Build Ltd2025
- Ace Apartments and Properties Ltd2019
- Advanced Construction Iver Ltd2012
All building contractors in Ruislip · All trades in Ruislip · Builders across the UK
Frequently asked questions
When are William James Construction Limited's accounts due?
William James Construction Limited's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is William James Construction Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is William James Construction Limited still trading?
William James Construction 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 William James Construction Limited do?
William James Construction Limited is registered under Construction of commercial buildings (SIC 41201).
How old is William James Construction Limited?
William James Construction Limited was incorporated on 25 February 2009, 17 years ago.
What is the penalty if William James 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 William James Construction 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.