- Companies
- Electricians
- Northampton
- Diamond Installations & Refurbishments Limited
Diamond Installations & Refurbishments Limited
- Company number
- 15938543
- Incorporated
- 5 Sep 20242 years trading
- Registered office
- Unit 29 JBJ Business Park Northampton Road, Blisworth, Northampton, NN7 3DW
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other construction installation
Diamond Installations & Refurbishments Limited is a 2-year-old private limited company registered in Northampton, company number 15938543, one of 214 electrical contractors in Northampton. 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.
Who runs and owns Diamond Installations & Refurbishments Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| N*** M*** | Director | Sep 2024 |
| N*** M*** | Director | Sep 2024 |
People with significant control (2)
Where Diamond Installations & Refurbishments Limited is registered
The registered office is in Northampton (NN7), in the West Northamptonshire local authority area, East Midlands. Show NN7 3DW on a map.
Other trade companies in NN7
- Cortinox LtdSpecialist contractors
- A & J Build LimitedProperty developers
- House21 Interiors LimitedJoiners and carpenters
- Air Fireshield LtdInstallers
- Autos Ace LtdMechanics and garages
- Alpha Plumbing & Air Conditioning LtdPlumbers and heating engineers
- Antoxa Garage LimitedMechanics and garages
- MLW Civils LtdCivil engineering
Shared registered office
32 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 Diamond Installations & Refurbishments 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 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
- 15938543
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 September 2024 (2 years ago)
- Registered office
- Unit 29 JBJ Business Park Northampton Road, Blisworth, Northampton, NN7 3DW
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290) - Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 4 September 2025
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Northampton
Other active electrical contractors registered in Northampton.
- Dilusso Electrical Ltd2022
- DJF Lighting Ltd2023
- Doctor Electric Ltd2019
- Doggett Electrical Services Limited2019
- Drain Servopipe Ltd2026
- DSB Electrical Ltd2024
- Eason Electrical Limited2013
- Ecosafeelectrical Ltd2021
All electrical contractors in Northampton · All trades in Northampton · Electricians across the UK
Frequently asked questions
When are Diamond Installations & Refurbishments Limited's accounts due?
Diamond Installations & Refurbishments Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Diamond Installations & Refurbishments Limited'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 Diamond Installations & Refurbishments Limited still trading?
Diamond Installations & Refurbishments Limited is listed as active on the Companies House register (checked 13 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 Diamond Installations & Refurbishments Limited do?
Diamond Installations & Refurbishments Limited is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290).
How old is Diamond Installations & Refurbishments Limited?
Diamond Installations & Refurbishments Limited was incorporated on 5 September 2024, 2 years ago.
Who runs Diamond Installations & Refurbishments Limited?
Diamond Installations & Refurbishments Limited has 2 active directors, the longest-serving appointed in Sep 2024. Their names and service addresses are on the Companies House register.
Who owns Diamond Installations & Refurbishments Limited?
2 people or companies have significant control of Diamond Installations & Refurbishments Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Diamond Installations & Refurbishments 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 Diamond Installations & Refurbishments Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.