- Companies
- Installers
- Ruislip
- Reason Development Group Ltd
Reason Development Group Ltd
- Company number
- 15948987
- Incorporated
- 10 Sep 20242 years trading
- Registered office
- 50 Angus Drive, Ruislip, HA4 0SB
- Nature of business
- Other construction installation; Other building completion and finishing; Other specialised construction activities n.e.c.; Educational support services
Reason Development Group Ltd is a 2-year-old private limited company registered in Ruislip, company number 15948987, one of 56 installation companies (insulation, lifts, shutters and similar) in Ruislip. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 September 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Reason Development Group Ltd is registered
The registered office is in Ruislip (HA4), in the Hillingdon local authority area, London. Show HA4 0SB on a map.
Other trade companies in HA4
- SSC London LtdGroundworks and demolition
- DCR Industriltdal LtdPainters and decorators
- Katardino Monten for General Contracting and Supplies LtdCivil engineering
- Apex Build & Move LtdBuilders
- Ridgeway Building Contracts LimitedProperty developers
- Azya Farah LtdBuilders
- Howdens Roofing & Guttering LimitedRoofers
- Vetro Glazing LimitedGlaziers
What happens if Reason Development Group 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £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
- 15948987
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 September 2024 (2 years ago)
- Registered office
- 50 Angus Drive, Ruislip, HA4 0SB
- Nature of business
- Other construction installation (SIC 43290)
Other building completion and finishing (SIC 43390)
Other specialised construction activities n.e.c. (SIC 43999)
Educational support services (SIC 85600) - Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 4 June 2026
- Previous names
- Reason Education Service Ltd (until 1 Jun 2026)
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Ruislip
Other active installation companies (insulation, lifts, shutters and similar) registered in Ruislip.
- Regal Timber Roof Experts Ltd2026
- Rendering Insulations Ltd2025
- Renovatio Inc Ltd2023
- Rosebuild Renovations Ltd2026
- Ruislip Marble Ltd2024
- Ryan Contractors Ltd2021
- Shellen Construction Limited1996
- Shellen Security Limited2013
All installation companies (insulation, lifts, shutters and similar) in Ruislip · All trades in Ruislip · Installers across the UK
Frequently asked questions
When are Reason Development Group Ltd's accounts due?
Reason Development Group Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Reason Development Group Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Reason Development Group Ltd still trading?
Reason Development Group 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 Reason Development Group Ltd do?
Reason Development Group Ltd is registered under Other construction installation (SIC 43290); Other building completion and finishing (SIC 43390); Other specialised construction activities n.e.c. (SIC 43999); Educational support services (SIC 85600).
How old is Reason Development Group Ltd?
Reason Development Group Ltd was incorporated on 10 September 2024, 2 years ago.
What is the penalty if Reason Development Group 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 Reason Development Group 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.