- Companies
- Specialist contractors
- London
- Dennis Lock & Key Limited
Dennis Lock & Key Limited
- Company number
- 05429315
- Incorporated
- 19 Apr 200521 years trading
- Registered office
- 255 Green Lanes, Palmes Green, London, N13 4XE
- Nature of business
- Other specialised construction activities n.e.c.
Dennis Lock & Key Limited is a 21-year-old private limited company registered in London, company number 05429315, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 27 January 2027, and the CT600 for the period to 27 April 2026 is due at HMRC on 27 April 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 £65K (-98.1%) on the year before, to £1,250.
- Net assets rose in 1 of 9 year-on-year comparisons on record.
- Current assets of £147K against £192K owed within a year: 0.8 times cover.
- 7 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £1,250 | £1,839 | £147K | £192K | 7 |
| 30 Apr 2024 | £66K | £37K | £162K | £153K | 7 |
| 30 Apr 2023 | £79K | £15K | £125K | £105K | 9 |
| 30 Apr 2022 | £137K | £110K | £197K | £136K | 9 |
| 30 Apr 2021 | £112K | £44K | £111K | £89K | 10 |
| 30 Apr 2020 | £141K | £50K | £118K | £112K | 10 |
| 30 Apr 2019 | £151K | £35K | £98K | £106K | 10 |
| 30 Apr 2018 | £164K | £8,120 | £85K | £95K | 10 |
| 30 Apr 2017 | £202K | £75K | £158K | £143K | 10 |
| 30 Apr 2016 | £261K | £58K | £167K | £104K |
Where Dennis Lock & Key Limited is registered
The registered office is in London (N13), in the Enfield local authority area, London. Show N13 4XE on a map.
Other trade companies in N13
- GKK Contractors LtdBuilders
- Baran MOT LimitedMechanics and garages
- Vick & Victor - Painting & Decorating LtdPainters and decorators
- Meti Flow Solutions LtdBuilders
- XP Plastering & Rendering LtdBuilders
- MD Crafted LtdSpecialist contractors
- Skilled Trades UK LtdPainters and decorators
- Danni Plumbing LtdPlumbers and heating engineers
Shared registered office
28 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 Dennis Lock & Key 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 27 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Jan 2027 to 27 Feb 2027 | £150 |
| 1 to 3 months late | 28 Feb 2027 to 27 Apr 2027 | £375 |
| 3 to 6 months late | 28 Apr 2027 to 27 Jul 2027 | £750 |
| More than 6 months late | From 28 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Apr 2027 | £200 |
| 3 months late | 27 Jul 2027 | another £200 |
| 6 months late | 27 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Apr 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
- 05429315
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 April 2005 (21 years ago)
- Registered office
- 255 Green Lanes, Palmes Green, London, N13 4XE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 27 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 19 April 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Denplex Arabia Ltd2025
- Dentalux Build Ltd2021
- Deon Energy Ltd2014
- Derisk (UK) Holdings Limited2019
- Derreeney Construction Services Ltd2023
- Desert Solar Power Ltd2016
- Design & Building Firm Ltd2015
- Design 121 Limited2017
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Dennis Lock & Key Limited's accounts due?
Dennis Lock & Key Limited's next accounts are due at Companies House by 27 January 2027 (in 106 days), covering the period to 27 April 2026.
When is Dennis Lock & Key Limited's CT600 due?
The CT600 for the period to 27 April 2026 is due at HMRC by 27 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 28 January 2027.
Is Dennis Lock & Key Limited still trading?
Dennis Lock & Key Limited 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 Dennis Lock & Key Limited do?
Dennis Lock & Key Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Dennis Lock & Key Limited?
Dennis Lock & Key Limited was incorporated on 19 April 2005, 21 years ago.
What is the penalty if Dennis Lock & Key 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 Dennis Lock & Key Limited 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.