- Company number
- 09855154
- Incorporated
- 3 Nov 201510 years trading
- Registered office
- 24 Baytree Walk, Watford, WD17 4YX
- Nature of business
- Construction of domestic buildings
Conversion Concepts Limited is a 10-year-old private limited company registered in Watford, company number 09855154, one of 365 building contractors in Watford. Its next accounts are due at Companies House on 30 November 2026, and its first CT600 is due at HMRC on 30 November 2026.
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 up £1M (+377.5%) on the year before, to £1.3M.
- Net assets rose in 8 of 8 year-on-year comparisons on record.
- Current assets of £1.6M against £821K owed within a year: 1.9 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2016 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £1.3M | £11K | £1.6M | £821K | 0 |
| 30 Nov 2023 | £276K | £9,854 | £1.5M | £825K | 0 |
| 30 Nov 2022 | £250K | £41K | £1.5M | £826K | 1 |
| 30 Nov 2021 | £204K | £13K | £2.8M | £813K | 1 |
| 30 Nov 2020 | £191K | £41K | £3.7M | £1.3M | 1 |
| 30 Nov 2019 | £166K | £143K | £3.7M | £1.4M | 1 |
| 30 Nov 2018 | £152K | £1.6M | £3.7M | £347K | 1 |
| 30 Nov 2017 | £39K | £20K | £2.1M | £247K | |
| 30 Nov 2016 | £6,479 | £9,540 | £1.8M | £999K |
Where Conversion Concepts Limited is registered
The registered office is in Watford (WD17), in the Watford local authority area, East of England. Show WD17 4YX on a map.
Other trade companies in WD17
- Ramauto LimitedMotor traders
- A1 Motors Watford LtdMechanics and garages
- Kola Brickwork LtdInstallers
- Appleby's Mechanical Services LtdPlumbers and heating engineers
- Kpu Services LtdProperty developers
- Highmark Investments LtdBuilders
- Boriama Private Office LimitedCleaning companies
- Oldsy Install LtdInstallers
What happens if Conversion Concepts 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 09855154
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 November 2015 (10 years ago)
- Registered office
- 24 Baytree Walk, Watford, WD17 4YX
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 9 July 2026
- Charges (mortgages)
- 1 outstanding of 3 registered
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 Watford
Other active building contractors registered in Watford.
- Corra Decorators Ltd2022
- Costell Builders Ltd2026
- CPF Automotive Limited2024
- Crownstone Investments Ltd2024
- Crut Construction Ltd2015
- Cso Projects & Surveying Ltd2025
- CTMK Construction Ltd2023
- CVM Lifting Ltd2019
All building contractors in Watford · All trades in Watford · Builders across the UK
Frequently asked questions
When are Conversion Concepts Limited's accounts due?
Conversion Concepts Limited's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Conversion Concepts Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 November 2025, due by 30 November 2026, and one for the period to 28 February 2026, due by 28 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Conversion Concepts Limited still trading?
Conversion Concepts 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 Conversion Concepts Limited do?
Conversion Concepts Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Conversion Concepts Limited?
Conversion Concepts Limited was incorporated on 3 November 2015, 10 years ago.
What is the penalty if Conversion Concepts 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 Conversion Concepts 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.