- Companies
- Groundworks and demolition
- London
- TT Diamond Drilling Ltd
TT Diamond Drilling Ltd
- Company number
- 16100198
- Incorporated
- 25 Nov 20241 year trading
- Registered office
- 11 Yarborough Road, London, SW19 2RH
- Nature of business
- Demolition; Test drilling and boring; Other building completion and finishing; Other specialised construction activities n.e.c.
TT Diamond Drilling Ltd is a 1-year-old private limited company registered in London, company number 16100198, one of 287 groundworks and demolition companies in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
Where TT Diamond Drilling Ltd is registered
The registered office is in London (SW19), in the Merton local authority area, London. Show SW19 2RH on a map.
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Also registered at this address
1 other company uses the same registered office as TT Diamond Drilling Ltd.
What happens if TT Diamond Drilling 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16100198
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2024 (1 year ago)
- Registered office
- 11 Yarborough Road, London, SW19 2RH
- Nature of business
- Demolition (SIC 43110)
Test drilling and boring (SIC 43130)
Other building completion and finishing (SIC 43390)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 24 November 2025
Filing notes for groundworks and demolition companies
Groundworks and demolition companies tend to own heavy plant, so capital allowances and hire purchase liabilities show up in both the accounts and the CT600.
Similar companies in London
Other active groundworks and demolition companies registered in London.
- Tulip Cleaning Ltd2025
- Unom Limited2020
- Urban Base Contractors Ltd2026
- Valiant Recap Services Ltd2020
- Vas 11 Services Ltd2025
- VB Plant Hire Ltd2018
- Vertex Build Solutions Ltd2026
- Vitakote Limited2016
All groundworks and demolition companies in London · All trades in London · Groundworks and demolition across the UK
Frequently asked questions
When are TT Diamond Drilling Ltd's accounts due?
TT Diamond Drilling Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is TT Diamond Drilling Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is TT Diamond Drilling Ltd still trading?
TT Diamond Drilling 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 TT Diamond Drilling Ltd do?
TT Diamond Drilling Ltd is registered under Demolition (SIC 43110); Test drilling and boring (SIC 43130); Other building completion and finishing (SIC 43390); Other specialised construction activities n.e.c. (SIC 43999).
How old is TT Diamond Drilling Ltd?
TT Diamond Drilling Ltd was incorporated on 25 November 2024, 1 year ago.
What is the penalty if TT Diamond Drilling 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 TT Diamond Drilling 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.