- Company number
- 17402747
- Incorporated
- 16 Aug 2026
- Registered office
- 59 Queen Mary Avenue, Morden, SM4 4JS
- Nature of business
- Construction of domestic buildings
J&A Diadia Ltd is a newly incorporated private limited company registered in Morden, company number 17402747, one of 191 building contractors in Morden. Its next accounts are due at Companies House on 16 May 2028, and its first CT600 is due at HMRC on 15 August 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 J&A Diadia Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| R*** D*** | Director | Aug 2026 |
Person with significant control
Where J&A Diadia Ltd is registered
The registered office is in Morden (SM4), in the Merton local authority area, London. Show SM4 4JS on a map.
Other trade companies in SM4
- Penta Projects LtdFinishing trades
- Vip Autos London LtdMotor traders
- Apx Mobile Mechanics LimitedMechanics and garages
- Global Autos London LtdMotor traders
- Prana Projects LimitedBuilders
- Londons Build UK LtdBuilders
- Hilal Al Emarate Building Cont. and BLDG. Materials TRDG. LtdBuilders
- Parixon LtdElectricians
What happens if J&A Diadia 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 16 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 17 May 2028 to 16 Jun 2028 | £150 |
| 1 to 3 months late | 17 Jun 2028 to 16 Aug 2028 | £375 |
| 3 to 6 months late | 17 Aug 2028 to 16 Nov 2028 | £750 |
| More than 6 months late | From 17 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17402747
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 August 2026
- Registered office
- 59 Queen Mary Avenue, Morden, SM4 4JS
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 Morden
Other active building contractors registered in Morden.
- Jani Building Services Ltd2015
- JPB Lofts and Extensions Limited2016
- Jupiter Builds Ltd2026
- Kabeer Constructions UK Ltd2025
- Kastrati Group Ltd2026
- KMK Phoenix Limited2016
- KVC Homecare and Lettings Limited2026
- Laza Project Ltd2023
All building contractors in Morden · All trades in Morden · Builders across the UK
Frequently asked questions
When are J&A Diadia Ltd's accounts due?
J&A Diadia Ltd's next accounts are due at Companies House by 16 May 2028 (in 581 days), covering the period to 31 August 2027.
When is J&A Diadia Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 15 August 2027, due by 15 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is J&A Diadia Ltd still trading?
J&A Diadia 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 J&A Diadia Ltd do?
J&A Diadia Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is J&A Diadia Ltd?
J&A Diadia Ltd was incorporated on 16 August 2026, less than a year ago.
Who runs J&A Diadia Ltd?
J&A Diadia Ltd has 1 active director, the longest-serving appointed in Aug 2026. Their names and service addresses are on the Companies House register.
Who owns J&A Diadia Ltd?
One person or company has significant control of J&A Diadia Ltd: an individual (owns 75% or more of the shares).
What is the penalty if J&A Diadia 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 J&A Diadia 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.