- Company number
- 12587844
- Incorporated
- 6 May 20206 years trading
- Registered office
- 6 Loxley Chase, Bolton, BL1 3UU
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
Iso Build Ltd is a 6-year-old private limited company registered in Bolton, company number 12587844, one of 258 building contractors in Bolton. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £480 (+480%) on the year before, to £580.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £6,717 against £19K owed within a year: 0.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £580 | £6,717 | £19K | 1 | |
| 31 May 2024 | £100 | ||||
| 31 May 2023 | £100 | ||||
| 31 May 2022 | £1 | ||||
| 31 May 2021 | £1 | £1 |
Where Iso Build Ltd is registered
The registered office is in Bolton (BL1), in the Bolton local authority area, North West. Show BL1 3UU on a map.
Other trade companies in BL1
- Loft Wise Solutions LtdInstallers
- Northwest Auto Group LtdMotor traders
- Avent Automotive LimitedMotor traders
- Gma Autos LtdMotor traders
- Borka Electrical Solutions LimitedElectricians
- Centurion Titan LimitedProperty developers
- The Pit Crew LimitedMechanics and garages
- Halcon Services LimitedCleaning companies
What happens if Iso Build 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 12587844
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 May 2020 (6 years ago)
- Registered office
- 6 Loxley Chase, Bolton, BL1 3UU
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 29 April 2026
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 Bolton
Other active building contractors registered in Bolton.
- J A T Brickwork Ltd2025
- J Marsh Joinery Limited2026
- J Powley Building Services Limited2026
- Ja Renovations Building Contractors Limited2019
- Jaid Construction Ltd2026
- Jameel Builder Ltd2025
- Jamlx Ltd2026
- JD Building & Maintenance Ltd2020
All building contractors in Bolton · All trades in Bolton · Builders across the UK
Frequently asked questions
When are Iso Build Ltd's accounts due?
Iso Build Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Iso Build Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Iso Build Ltd still trading?
Iso Build 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 Build Ltd do?
Iso Build Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Iso Build Ltd?
Iso Build Ltd was incorporated on 6 May 2020, 6 years ago.
What is the penalty if Iso Build 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 Build 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.