- Company number
- 17421891
- Incorporated
- 26 Aug 2026
- Registered office
- 418 Birchfield Lane, Oldbury, B69 1AF
- Nature of business
- Construction of domestic buildings; Sale of used cars and light motor vehicles
Key Source Limited is a newly incorporated private limited company registered in Oldbury, company number 17421891, one of 126 building contractors in Oldbury. Its next accounts are due at Companies House on 26 May 2028, and its first CT600 is due at HMRC on 25 August 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Public contracts won
Key Source Limited has 13 public sector contract awards on record; the ones with their own published value total £1.9M, from 2015 to 2025. Source: Contracts Finder and Find a Tender award notices. For 6 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. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Royal Holloway and Bedford New College2 awards
- Leeds City Council2 awards
- NEUPC Ltd2 awards
- UK Research & Innovation2 awards
- Brunel University London1 award
Showing the 10 most recent of 13.
Where Key Source Limited is registered
The registered office is in Oldbury (B69), in the Sandwell local authority area, West Midlands. Show B69 1AF on a map.
Other trade companies in B69
- Budmax Group LimitedInstallers
- Nexa Power & Energy LtdMachinery repair and installation
- Elevate GB Scaffolding LtdScaffolders
- FJR Motors LtdMotor traders
- Obt LimitedMechanics and garages
- Chauhan Sons LimitedBuilders
- Miani Construction LtdBuilders
- The Van Unit LtdMechanics and garages
What happens if Key Source 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 26 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 27 May 2028 to 26 Jun 2028 | £150 |
| 1 to 3 months late | 27 Jun 2028 to 26 Aug 2028 | £375 |
| 3 to 6 months late | 27 Aug 2028 to 26 Nov 2028 | £750 |
| More than 6 months late | From 27 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17421891
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 August 2026
- Registered office
- 418 Birchfield Lane, Oldbury, B69 1AF
- Nature of business
- Construction of domestic buildings (SIC 41202)
Sale of used cars and light motor vehicles (SIC 45112) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 Oldbury
Other active building contractors registered in Oldbury.
- KK Builder Merchant Ltd2024
- Lordswood Construction Ltd2007
- Mamba Corp Ltd2022
- Marku Brothers Construction Ltd2025
- MBC Builders Ltd2025
- MCS Developments Ltd2018
- Miani Construction Ltd2026
- Milestone Trading Ltd2025
All building contractors in Oldbury · All trades in Oldbury · Builders across the UK
Frequently asked questions
When are Key Source Limited's accounts due?
Key Source Limited's next accounts are due at Companies House by 26 May 2028 (in 591 days), covering the period to 31 August 2027.
When is Key Source Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 25 August 2027, due by 25 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Key Source Limited still trading?
Key Source 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 Key Source Limited do?
Key Source Limited is registered under Construction of domestic buildings (SIC 41202); Sale of used cars and light motor vehicles (SIC 45112).
How old is Key Source Limited?
Key Source Limited was incorporated on 26 August 2026, less than a year ago.
Has Key Source Limited won public sector contracts?
Yes. Key Source Limited has 13 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.9M), most recently from Royal Holloway and Bedford New College.
What is the penalty if Key Source 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 Key Source 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.