- Companies
- Specialist contractors
- London
- Keystone Development Enterprises Limited
Keystone Development Enterprises Limited
- Company number
- 17210574
- Incorporated
- 11 May 2026
- Registered office
- C/O Archer Associates Churchill House, 120 Bunns Lane, London, NW7 2AS
- Nature of business
- Other specialised construction activities n.e.c.
Keystone Development Enterprises Limited is a newly incorporated private limited company registered in London, company number 17210574, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 11 February 2028, and its first CT600 is due at HMRC on 10 May 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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Who runs and owns Keystone Development Enterprises Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| G*** M*** | Director | May 2026 |
| G*** S*** | Director | Jun 2026 |
| G*** S*** | Secretary | May 2026 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| G*** S*** | Director | May 2026 | May 2026 |
Person with significant control
Where Keystone Development Enterprises Limited is registered
The registered office is in London (NW7), in the Barnet local authority area, London. Show NW7 2AS on a map.
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- Emergency Cleaning 24/7 LtdCleaning companies
Shared registered office
47 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 Keystone Development Enterprises 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 11 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 12 Feb 2028 to 11 Mar 2028 | £150 |
| 1 to 3 months late | 12 Mar 2028 to 11 May 2028 | £375 |
| 3 to 6 months late | 12 May 2028 to 11 Aug 2028 | £750 |
| More than 6 months late | From 12 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 17210574
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 May 2026
- Registered office
- C/O Archer Associates Churchill House, 120 Bunns Lane, London, NW7 2AS
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- KG Consultancy Ltd2022
- KGS Design and Build Ltd2025
- KGW Limited2024
- Khasz Construction Ltd2026
- Khspropertymaintenance Ltd2026
- Khudo Group Ltd2026
- Kijan Carpentry Limited2014
- Kilic Lifting & Crane Services Ltd2021
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Keystone Development Enterprises Limited's accounts due?
Keystone Development Enterprises Limited's next accounts are due at Companies House by 11 February 2028 (in 487 days), covering the period to 31 May 2027.
When is Keystone Development Enterprises 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 10 May 2027, due by 10 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Keystone Development Enterprises Limited still trading?
Keystone Development Enterprises 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 Keystone Development Enterprises Limited do?
Keystone Development Enterprises Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Keystone Development Enterprises Limited?
Keystone Development Enterprises Limited was incorporated on 11 May 2026, less than a year ago.
Who runs Keystone Development Enterprises Limited?
Keystone Development Enterprises Limited has 2 active directors, the longest-serving appointed in May 2026. Their names and service addresses are on the Companies House register.
Who owns Keystone Development Enterprises Limited?
One person or company has significant control of Keystone Development Enterprises Limited: an individual (owns 75% or more of the shares).
What is the penalty if Keystone Development Enterprises 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 Keystone Development Enterprises 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.