- Companies
- Builders
- Northampton
- Decolux Ltd
Decolux Ltd
- Company number
- 15293241
- Incorporated
- 19 Nov 20232 years trading
- Registered office
- 39 Mapperley Drive, Northampton, NN3 9UF
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Painting
Decolux Ltd is a 2-year-old private limited company registered in Northampton, company number 15293241, one of 586 building contractors in Northampton. Companies House shows its accounts as overdue: they were due on 31 August 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2024
From the balance sheet at 30 November 2024, as filed at Companies House.
Where Decolux Ltd is registered
The registered office is in Northampton (NN3), in the West Northamptonshire local authority area, East Midlands. Show NN3 9UF on a map.
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What happens if Decolux Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2026 to 30 Sep 2026 | £150 |
| 1 to 3 months late | 1 Oct 2026 to 30 Nov 2026 | £375 |
| 3 to 6 months late | 1 Dec 2026 to 28 Feb 2027 | £750 |
| More than 6 months late | From 1 Mar 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 15293241
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 November 2023 (2 years ago)
- Registered office
- 39 Mapperley Drive, Northampton, NN3 9UF
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Painting (SIC 43341) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 21 January 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 Northampton
Other active building contractors registered in Northampton.
- Deivisbuild Limited2014
- Derut Construct Limited2018
- DG Ceilings & Partitions Ltd2026
- DGL Construction Ltd2018
- Digroundworks Ltd2026
- Dimants Building Services Limited2023
- Dino Construct Ltd2025
- DJP Construction Limited2004
All building contractors in Northampton · All trades in Northampton · Builders across the UK
Frequently asked questions
When are Decolux Ltd's accounts due?
Decolux Ltd's accounts were due at Companies House on 31 August 2026 and the register shows them as overdue.
When is Decolux Ltd's CT600 due?
The CT600 for the period to 30 November 2025 is due at HMRC by 30 November 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2026.
Is Decolux Ltd still trading?
Decolux 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 Decolux Ltd do?
Decolux Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Painting (SIC 43341).
How old is Decolux Ltd?
Decolux Ltd was incorporated on 19 November 2023, 2 years ago.
What is the penalty if Decolux 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 Decolux 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.