- Companies
- Specialist contractors
- Caernarfon
- Gwynedd Insulation Limited
Gwynedd Insulation Limited
- Company number
- 07194579
- Incorporated
- 18 Mar 201016 years trading
- Registered office
- 3 Cae'r Eglwys, Rhostryfan, Caernarfon, Gwynedd, LL54 7LQ
- Nature of business
- Other specialised construction activities n.e.c.
Gwynedd Insulation Limited is a 16-year-old private limited company registered in Caernarfon, company number 07194579, one of 14 specialist construction companies in Caernarfon. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 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 up £71K (+36.2%) on the year before, to £266K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £228K against £26K owed within a year: 8.6 times cover.
- 3 employees on average, up from 0 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £266K | £228K | £26K | 3 | |
| 31 Mar 2024 | £195K | £123K | £7,055 | 0 | |
| 31 Mar 2023 | £149K | £86K | £577 | 3 | |
| 31 Mar 2022 | £108K | £98K | £11K | 3 | |
| 31 Mar 2021 | £120K | £184K | £87K | 3 | |
| 31 Mar 2020 | £128K | £134K | £34K | 3 | |
| 31 Mar 2019 | £160K | £15K | £254K | £126K | 3 |
| 31 Mar 2018 | £198K | £51K | £202K | £42K | 3 |
| 31 Mar 2017 | £215K | £204K | £35K | ||
| 31 Mar 2016 | £245K | £137K | £303K | £108K |
Where Gwynedd Insulation Limited is registered
The registered office is in Caernarfon (LL54), in the Gwynedd local authority area, Wales. Show LL54 7LQ on a map.
Other trade companies in LL54
- Ow Autos LimitedMechanics and garages
- Sej Motors LtdMechanics and garages
- Aw Diving LtdCivil engineering
- PWG Construction LtdBuilders
- Cars Gwynedd LimitedMotor traders
- Gwasanaethau Adeiladu A Chyfleustodau WR Construction and Utility Services LimitedInstallers
- CLP Surfacing & Groundworks LtdCivil engineering
- Rirox LtdBuilders
What happens if Gwynedd Insulation 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 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
- 07194579
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 March 2010 (16 years ago)
- Registered office
- 3 Cae'r Eglwys, Rhostryfan, Caernarfon, Gwynedd, LL54 7LQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 April 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 Caernarfon
Other active specialist construction companies registered in Caernarfon.
- Gwynedd Safeflue Specialists Ltd2018
- Innkeeper Liquid Screed Ltd2012
- Jarvis Pressure Pointing & Grouting Limited2002
- KWG Building & Civils Contractor Limited2019
- M&S Concrete Imprinting Ltd2016
- North Wales Liquid Screed Ltd2020
- O'Brien Offshore Ltd2025
- PSR Controls Ltd2020
All specialist construction companies in Caernarfon · All trades in Caernarfon · Specialist contractors across the UK
Frequently asked questions
When are Gwynedd Insulation Limited's accounts due?
Gwynedd Insulation Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Gwynedd Insulation Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Gwynedd Insulation Limited still trading?
Gwynedd Insulation 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 Gwynedd Insulation Limited do?
Gwynedd Insulation Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Gwynedd Insulation Limited?
Gwynedd Insulation Limited was incorporated on 18 March 2010, 16 years ago.
What is the penalty if Gwynedd Insulation 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 Gwynedd Insulation 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.