- Companies
- Specialist contractors
- Pontypridd
- Isw & Sons Ltd
Isw & Sons Ltd
- Company number
- 11484956
- Incorporated
- 26 Jul 20188 years trading
- Registered office
- 66 Elm Street, Rhydyfelin, Pontypridd, CF37 5DG
- Nature of business
- Other specialised construction activities n.e.c.
Isw & Sons Ltd is a 8-year-old private limited company registered in Pontypridd, company number 11484956, one of 34 specialist construction companies in Pontypridd. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £40K (+26.8%) on the year before, to £189K.
- Net assets rose in 7 of 7 year-on-year comparisons on record.
- Current assets of £206K against £22K owed within a year: 9.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 8 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £189K | £206K | £22K | 1 | |
| 31 Jul 2024 | £149K | £165K | £21K | 1 | |
| 31 Jul 2023 | £98K | £141K | £49K | 1 | |
| 31 Jul 2022 | £77K | £108K | £38K | 1 | |
| 31 Jul 2021 | £68K | £76K | £17K | 1 | |
| 31 Jul 2020 | £64K | £78K | £26K | 1 | |
| 30 Jul 2020 | £58K | £70K | £25K | 1 | |
| 31 Jul 2019 | £40K | £77K | £37K |
Where Isw & Sons Ltd is registered
The registered office is in Pontypridd (CF37), in the Rhondda Cynon Taf local authority area, Wales. Show CF37 5DG on a map.
Other trade companies in CF37
- Hamilton Motor Group LtdMotor traders
- Pencoed Building Services LtdSpecialist contractors
- Pyo Property Developments LimitedBuilders
- Great Choice Leisure Vehicles LimitedMotor traders
- C2 Interior Contractors LtdBuilders
- Carpet Mine LtdFinishing trades
- LCH4RP LtdProperty developers
- LCH4Est LtdProperty developers
What happens if Isw & Sons 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 11484956
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 July 2018 (8 years ago)
- Registered office
- 66 Elm Street, Rhydyfelin, Pontypridd, CF37 5DG
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 25 July 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 Pontypridd
Other active specialist construction companies registered in Pontypridd.
- Jem Industries Ltd2024
- Joshua Pritchard Services Ltd2021
- Keith Evans Plant & Building Limited2019
- Korbuild Limited2004
- LMP Glass Limited2024
- Maguire Construction UK Limited1998
- Neil Cross Formwork and Construction Services Limited2021
- Pencoed Building Services Ltd2026
All specialist construction companies in Pontypridd · All trades in Pontypridd · Specialist contractors across the UK
Frequently asked questions
When are Isw & Sons Ltd's accounts due?
Isw & Sons Ltd's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Isw & Sons Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Isw & Sons Ltd still trading?
Isw & Sons 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 Isw & Sons Ltd do?
Isw & Sons Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Isw & Sons Ltd?
Isw & Sons Ltd was incorporated on 26 July 2018, 8 years ago.
What is the penalty if Isw & Sons 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 Isw & Sons 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.