- Companies
- Finishing trades
- London
- Iso Building Ltd
Iso Building Ltd
- Company number
- 07179307
- Incorporated
- 5 Mar 201016 years trading
- Registered office
- 601 Britannia House, 1 Glenthorne Road, London, W6 0LH
- Nature of business
- Other building completion and finishing
Iso Building Ltd is a 16-year-old private limited company registered in London, company number 07179307, one of 3,947 building finishing companies in London. Its next accounts are due at Companies House on 27 December 2026, and the CT600 for the period to 27 March 2026 is due at HMRC on 27 March 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 £5,890 (-1.2%) on the year before, to -£503K.
- Net assets rose in 1 of 9 year-on-year comparisons on record.
- 2 employees on average, down from 5 the year before.
- 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 |
|---|---|---|---|---|---|
| 27 Mar 2025 | -£503K | £377 | £176K | 2 | |
| 27 Mar 2024 | -£498K | £2,438 | £111K | 5 | |
| 28 Mar 2023 | -£454K | £1,511 | £82K | 2 | |
| 30 Mar 2022 | -£381K | £395 | £395 | £69K | 3 |
| 31 Mar 2021 | -£335K | £5,126 | £12K | 3 | |
| 31 Mar 2020 | -£212K | £6,403 | £99K | 3 | |
| 31 Mar 2019 | -£167K | £4,189 | £172K | ||
| 31 Mar 2018 | -£50K | £52K | |||
| 31 Mar 2017 | -£49K | £4,956 | £4,956 | £57K | |
| 31 Mar 2016 | -£92K | £840 | £1,985 | £94K |
Where Iso Building Ltd is registered
The registered office is in London (W6), in the Hammersmith and Fulham local authority area, London. Show W6 0LH on a map.
Other trade companies in W6
- Goldhawk Contractors LtdInstallers
- Glow Trading LtdCleaning companies
- Element 4 Construction LtdFinishing trades
- Deluxe Partners LtdCleaning companies
- Starline Motors LimitedMotor traders
- Piotr Olechno Decorator LtdPainters and decorators
- PHJ Construction LtdBuilders
- Tribesell Motors LimitedMotor traders
Also registered at this address
18 other companies use the same registered office as Iso Building Ltd.
- 3D Art Factory LtdCivil engineering
- A Mako LtdSpecialist contractors
- And Trade Company LtdBuilders
- BLS Electrical LtdElectricians
- Building Intelligent Construction LtdBuilders
- Enterprise Construction LtdBuilders
- H.I.T. Construction LimitedBuilders
- Ibocan LimitedFinishing trades
- J & B Vision LtdInstallers
- Jellies Itb LimitedSpecialist contractors
- Lighting Solution Corporation LtdElectricians
- Loo Capital LimitedCleaning companies
- South River Cleaning Services LimitedCleaning companies
- Valet Care LimitedCleaning companies
- VGB LtdElectricians
- Vibra Engineering LimitedMachinery repair and installation
- VVT Building Services LtdFinishing trades
- Y&A Southern LtdElectricians
What happens if Iso Building 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 27 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Dec 2026 to 27 Jan 2027 | £150 |
| 1 to 3 months late | 28 Jan 2027 to 27 Mar 2027 | £375 |
| 3 to 6 months late | 28 Mar 2027 to 27 Jun 2027 | £750 |
| More than 6 months late | From 28 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Mar 2027 | £200 |
| 3 months late | 27 Jun 2027 | another £200 |
| 6 months late | 27 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Mar 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
- 07179307
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 March 2010 (16 years ago)
- Registered office
- 601 Britannia House, 1 Glenthorne Road, London, W6 0LH
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 27 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 27 March 2025
- Last confirmation statement
- 7 March 2026
- Previous names
- Engn Service Ltd (until 20 May 2019)
Iso Building Services Limited (until 1 May 2019)
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in London
Other active building finishing companies registered in London.
- Issa Maintenance Ltd2025
- Istos Constructions Limited2017
- Italporto Shopfitters Limited2010
- Itn Action Ltd2015
- Itrs Solutions Ltd2014
- Its UK Group Ltd2015
- Iulic Ltd2014
- Ivan G Ltd2022
All building finishing companies in London · All trades in London · Finishing trades across the UK
Frequently asked questions
When are Iso Building Ltd's accounts due?
Iso Building Ltd's next accounts are due at Companies House by 27 December 2026 (in 76 days), covering the period to 27 March 2026.
When is Iso Building Ltd's CT600 due?
The CT600 for the period to 27 March 2026 is due at HMRC by 27 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 28 December 2026.
Is Iso Building Ltd still trading?
Iso Building 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 Iso Building Ltd do?
Iso Building Ltd is registered under Other building completion and finishing (SIC 43390).
How old is Iso Building Ltd?
Iso Building Ltd was incorporated on 5 March 2010, 16 years ago.
What is the penalty if Iso Building 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 Iso Building 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.