- Company number
- 08762604
- Incorporated
- 5 Nov 201312 years trading
- Registered office
- Knight Chadwick ,, 243 Elgin Avenue, London, W9 1NJ
- Nature of business
- Construction of domestic buildings
Smart Conversion Ltd is a 12-year-old private limited company registered in London, company number 08762604, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 December 2027, and its first CT600 is due at HMRC on 30 November 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 up £107K (+62.4%) on the year before, to £278K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £835K against £582K owed within a year: 1.4 times cover.
- 9 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 Nov 2025 | £278K | £94K | £835K | £582K | 9 |
| 30 Nov 2024 | £171K | £148K | £368K | £192K | 9 |
| 30 Nov 2023 | £179K | £153K | £370K | £167K | 9 |
| 30 Nov 2022 | £196K | £460K | £460K | £202K | 8 |
| 30 Nov 2021 | £135K | £183K | £457K | £238K | 7 |
| 30 Nov 2020 | £17K | £131K | £483K | £364K | 8 |
| 30 Nov 2019 | £9,102 | £72K | £201K | £247K | 8 |
| 30 Nov 2018 | £20K | £5,985 | £90K | £128K | |
| 30 Nov 2017 | £36K | £44K | £172K | £202K | |
| 30 Nov 2016 | £44K | £10K | £135K | £138K |
Where Smart Conversion Ltd is registered
The registered office is in London (W9), in the Westminster local authority area, London. Show W9 1NJ on a map.
Other trade companies in W9
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- Trillion Trades Motors LtdMotor traders
- MC Builders Direct & Roof Repairs LimitedFinishing trades
- Circle Tech London LimitedFinishing trades
- Electrical H Services LtdElectricians
- Luxe Property Estate LtdFinishing trades
- Call Me Builder Services LtdBuilders
- RSJJ LtdProperty developers
What happens if Smart Conversion 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 08762604
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 November 2013 (12 years ago)
- Registered office
- Knight Chadwick ,, 243 Elgin Avenue, London, W9 1NJ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 5 November 2025
- Charges (mortgages)
- 1 outstanding of 1 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 London
Other active building contractors registered in London.
- Smart Designs Constructors Limited2018
- Smart Home Design and Construction Ltd2017
- Smart Installations Solutions Ltd2023
- Smart Integration Systems Ltd2019
- Smart LVL Building Services Ltd.2015
- Smart Market Properties Limited2026
- Smart Paving & Landscapes Ltd2019
- Smart Property Investment KD Ltd2025
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Smart Conversion Ltd's accounts due?
Smart Conversion Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Smart Conversion 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 30 November 2026, due by 30 November 2027, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Smart Conversion Ltd still trading?
Smart Conversion 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 Smart Conversion Ltd do?
Smart Conversion Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Smart Conversion Ltd?
Smart Conversion Ltd was incorporated on 5 November 2013, 12 years ago.
What is the penalty if Smart Conversion 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 Smart Conversion 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.