- Company number
- 09951709
- Incorporated
- 14 Jan 201610 years trading
- Registered office
- 11 Yarborough Road, London, SW19 2RH
- Nature of business
- Construction of domestic buildings
JJ Developments Building & Home Improvements Ltd is a 10-year-old private limited company registered in London, company number 09951709, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £6,070 (-61.3%) on the year before, to £3,827.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- Current assets of £5,075 against £20K owed within a year: 0.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £3,827 | £5,075 | £20K | 2 | |
| 31 Jan 2024 | £9,897 | £48K | £26K | 2 | |
| 31 Jan 2023 | £837 | £837 | 1 | ||
| 31 Jan 2022 | -£7,533 | £180 | £7,713 | 1 | |
| 31 Jan 2021 | -£4,145 | £7,074 | £11K | 1 | |
| 31 Jan 2020 | £9,284 | £9,748 | £2,322 | 1 | |
| 31 Jan 2019 | £1,254 | £58 | £2,520 | ||
| 31 Jan 2018 | £5,812 | £1,322 | £1,084 | ||
| 31 Jan 2017 | £5,902 | £2,029 | £2,029 | £3,559 |
Who runs and owns JJ Developments Building & Home Improvements Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| T*** T*** | Director | Jan 2016 |
Person with significant control
Where JJ Developments Building & Home Improvements Ltd is registered
The registered office is in London (SW19), in the Merton local authority area, London. Show SW19 2RH on a map.
Other trade companies in SW19
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- Base Bloc LimitedBuilders
- Concealed Climate LimitedPlumbers and heating engineers
- Morningside LtdProperty developers
- Cupi-Building LtdBuilders
- Crown Infra London LtdBuilders
- Aj & Co One LtdProperty developers
Also registered at this address
1 other company uses the same registered office as JJ Developments Building & Home Improvements Ltd.
- TT Diamond Drilling LtdGroundworks and demolition
What happens if JJ Developments Building & Home Improvements 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 09951709
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 January 2016 (10 years ago)
- Registered office
- 11 Yarborough Road, London, SW19 2RH
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 13 January 2026
- Previous names
- JJ Develompments Home Improvements Ltd (until 30 Mar 2016)
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 London
Other active building contractors registered in London.
- JJ-Build Limited2017
- JJ.Allen Ltd2012
- JJM Contractors Ltd2013
- Jjrconstruction Ltd2024
- JJZ Plumbing and Heating Ltd2018
- JK and Sons London Limited2025
- JK Brothers Rendering Ltd2024
- JK Builders Services Ltd2021
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Frequently asked questions
When are JJ Developments Building & Home Improvements Ltd's accounts due?
JJ Developments Building & Home Improvements Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is JJ Developments Building & Home Improvements Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is JJ Developments Building & Home Improvements Ltd still trading?
JJ Developments Building & Home Improvements 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 JJ Developments Building & Home Improvements Ltd do?
JJ Developments Building & Home Improvements Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is JJ Developments Building & Home Improvements Ltd?
JJ Developments Building & Home Improvements Ltd was incorporated on 14 January 2016, 10 years ago.
Who runs JJ Developments Building & Home Improvements Ltd?
JJ Developments Building & Home Improvements Ltd has 1 active director, the longest-serving appointed in Jan 2016. Their names and service addresses are on the Companies House register.
Who owns JJ Developments Building & Home Improvements Ltd?
One person or company has significant control of JJ Developments Building & Home Improvements Ltd: an individual (owns 75% or more of the shares).
What is the penalty if JJ Developments Building & Home Improvements 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 JJ Developments Building & Home Improvements 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.