William King Construction Ltd
- Company number
- 10417822
- Incorporated
- 10 Oct 201610 years trading
- Registered office
- Milburn House, 3 Oxford Street, Cumbria, Workington, CA14 2AL
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
William King Construction Ltd is a 10-year-old private limited company registered in Cumbria, Workington, company number 10417822, one of the UK's building contractors. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £429K (+51.2%) on the year before, to £1.3M.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £2.2M against £1.3M owed within a year: 1.7 times cover.
- 73 employees on average, up from 64 the year before.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £1.3M | £624K | £2.2M | £1.3M | 73 |
| 30 Sep 2024 | £838K | £481K | £1.5M | £843K | 64 |
| 30 Sep 2023 | £252K | £137K | £606K | £402K | 48 |
| 30 Sep 2022 | £166K | £36K | £426K | £308K | 31 |
| 30 Sep 2021 | £165K | £96K | £429K | £273K | 31 |
| 30 Sep 2020 | £191K | £179K | £402K | £206K | 31 |
| 30 Sep 2019 | £205K | £126K | £333K | £190K | 24 |
Public contracts won
William King Construction Ltd has one public sector contract award on record (2025). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Cumberland Council | Capital Works (Construction) Framework 2025-2029 | Ceiling, not shown | 19 Nov 2025 |
Where William King Construction Ltd is registered
The registered office is in Cumbria, Workington (CA14), in the Cumberland local authority area, North West. Show CA14 2AL on a map.
Other trade companies in CA14
- Premier Heating Solutions Cumbria LimitedPlumbers and heating engineers
- Northern Resin LtdFloor and wall tilers
- GRT Property Solutions LtdPlumbers and heating engineers
- Jre Partitions and Ceilings LimitedInstallers
- Fellside Homes & Renovations(Cumbria) LtdProperty developers
- Pristine Plumb & Bath LtdPlumbers and heating engineers
- The Cumbrian Painting Company LtdBuilders
- J.Proud Plastering LtdPlasterers
Shared registered office
40 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 William King Construction 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 10417822
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 October 2016 (10 years ago)
- Registered office
- Milburn House, 3 Oxford Street, Cumbria, Workington, CA14 2AL
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 30 September (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 9 October 2025
- Previous names
- William King Brickwork Solutions Limited (until 16 Nov 2023)
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
Other active building contractors.
Frequently asked questions
When are William King Construction Ltd's accounts due?
William King Construction Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is William King Construction Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is William King Construction Ltd still trading?
William King Construction 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 William King Construction Ltd do?
William King Construction Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is William King Construction Ltd?
William King Construction Ltd was incorporated on 10 October 2016, 10 years ago.
Has William King Construction Ltd won public sector contracts?
Yes. William King Construction Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from Cumberland Council.
What is the penalty if William King Construction 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 William King Construction Ltd 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.