- Companies
- Property developers
- London
- Third Phase Developments Ltd
Third Phase Developments Ltd
- Company number
- 17272345
- Incorporated
- 10 Jun 2026
- Registered office
- Flat 4, 17, Thornhill Crescent, London, N1 1BL
- Nature of business
- Development of building projects
Third Phase Developments Ltd is a newly incorporated private limited company registered in London, company number 17272345, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 10 March 2028, and its first CT600 is due at HMRC on 9 June 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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Where Third Phase Developments Ltd is registered
The registered office is in London (N1), in the Islington local authority area, London. Show N1 1BL on a map.
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What happens if Third Phase Developments 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 10 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 Mar 2028 to 10 Apr 2028 | £150 |
| 1 to 3 months late | 11 Apr 2028 to 10 Jun 2028 | £375 |
| 3 to 6 months late | 11 Jun 2028 to 10 Sep 2028 | £750 |
| More than 6 months late | From 11 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 17272345
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 June 2026
- Registered office
- Flat 4, 17, Thornhill Crescent, London, N1 1BL
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Third Unicorn Limited2024
- Thistle Do Nicely Property Ltd2026
- Thistlerock Developments Limited2023
- Thomados Co Ltd2024
- Thomas Builders Limited2019
- Thomas Lipton Ltd2017
- Thoracic Surgery Trading Limited2017
- Thornbally Property Consultancy Limited2021
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Third Phase Developments Ltd's accounts due?
Third Phase Developments Ltd's next accounts are due at Companies House by 10 March 2028 (in 514 days), covering the period to 30 June 2027.
When is Third Phase Developments 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 9 June 2027, due by 9 June 2028, and one for the period to 30 June 2027, due by 30 June 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Third Phase Developments Ltd still trading?
Third Phase Developments 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 Third Phase Developments Ltd do?
Third Phase Developments Ltd is registered under Development of building projects (SIC 41100).
How old is Third Phase Developments Ltd?
Third Phase Developments Ltd was incorporated on 10 June 2026, less than a year ago.
What is the penalty if Third Phase Developments 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 Third Phase Developments 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.