- Company number
- 16743923
- Incorporated
- 25 Sep 20251 year trading
- Registered office
- 22 Covent Garden, Willingham, Cambridge, CB24 5GE
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
Osp Building Ltd is a 1-year-old private limited company registered in Cambridge, company number 16743923, one of 238 building contractors in Cambridge. Its next accounts are due at Companies House on 25 June 2027, and its first CT600 is due at HMRC on 24 September 2027.
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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Where Osp Building Ltd is registered
The registered office is in Cambridge (CB24), in the South Cambridgeshire local authority area, East of England. Show CB24 5GE on a map.
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What happens if Osp Building 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 25 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 Jun 2027 to 25 Jul 2027 | £150 |
| 1 to 3 months late | 26 Jul 2027 to 25 Sep 2027 | £375 |
| 3 to 6 months late | 26 Sep 2027 to 25 Dec 2027 | £750 |
| More than 6 months late | From 26 Dec 2027 | £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
- 16743923
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2025 (1 year ago)
- Registered office
- 22 Covent Garden, Willingham, Cambridge, CB24 5GE
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 24 September 2026
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 Cambridge
Other active building contractors registered in Cambridge.
- Overhall Projects Limited2022
- Paddock ST Holdings Ltd1993
- Pasha Building Maintenance Ltd2024
- Pathfinder Construction Ltd2021
- Peter Saunders Builders Limited1996
- PFD111 Ltd2025
- Philip Boswell Homes Limited2016
- Phoenix 50/50 Limited2015
All building contractors in Cambridge · All trades in Cambridge · Builders across the UK
Frequently asked questions
When are Osp Building Ltd's accounts due?
Osp Building Ltd's next accounts are due at Companies House by 25 June 2027 (in 256 days), covering the period to 30 September 2026.
When is Osp Building Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 24 September 2026, due by 24 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Osp Building Ltd still trading?
Osp Building Ltd is listed as active on the Companies House register (checked 12 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 Osp Building Ltd do?
Osp Building Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Osp Building Ltd?
Osp Building Ltd was incorporated on 25 September 2025, 1 year ago.
What is the penalty if Osp Building 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 Osp Building Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.