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- Anglesey & Gwynedd Groundworks Ltd
Anglesey & Gwynedd Groundworks Ltd
- Company number
- 12297609
- Incorporated
- 4 Nov 20196 years trading
- Registered office
- 19 Lon Cilgwyn, Caernarfon, LL55 2DQ
- Nature of business
- Other construction installation
Anglesey & Gwynedd Groundworks Ltd is a 6-year-old private limited company registered in Caernarfon, company number 12297609, one of 5 installation companies (insulation, lifts, shutters and similar) in Caernarfon. Companies House shows its accounts as overdue: they were due on 31 August 2026.
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 £4,012 (+8.8%) on the year before, to £49K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £142K against £132K owed within a year: 1.1 times cover.
- 7 employees on average during the year.
- Balance sheets on record for 5 years, 2020 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £49K | £54K | £142K | £132K | 7 |
| 30 Nov 2023 | £45K | £19K | £90K | £86K | 7 |
| 30 Nov 2022 | £13K | £29K | £65K | £41K | 6 |
| 30 Nov 2021 | -£1,588 | £28K | £72K | £39K | 5 |
| 30 Nov 2020 | £100 |
Public contracts won
Anglesey & Gwynedd Groundworks Ltd has 5 public sector contract awards on record; the ones with their own published value total £199K (2026). Source: Contracts Finder and Find a Tender award notices. For 1 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Cyngor Gwynedd3 awards
- Adra (Tai) Cyf2 awards
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Cyngor Gwynedd | Gwynedd and Anglesey Structures & Coastal Maintenance Framework 2026 | Ceiling, not shown | 17 Aug 2026 |
| Adra (Tai) Cyf | Re-surface at Gwyrfai Terrace, Deiniolen, Caernarfon | £30K | 10 Aug 2026 |
| Adra (Tai) Cyf | AM 419B - Groundworks - Externals - Glan Pwll Nefyn, Pwllheli | £35K | 8 Jun 2026 |
| Cyngor Gwynedd | Improvements to Lon Golff and the Beach Slipway in Aberosch | £39K | 30 Jan 2026 |
| Cyngor Gwynedd | Access Improvements to Morfa Bychan | £95K | 29 Jan 2026 |
Where Anglesey & Gwynedd Groundworks Ltd is registered
The registered office is in Caernarfon (LL55), in the Gwynedd local authority area, Wales. Show LL55 2DQ on a map.
Other trade companies in LL55
- Gic Construction & Groundworks LtdInstallers
- Caton Site Welding LtdMachinery repair and installation
- Celtic Heritage Stonemasonry LimitedCivil engineering
- Celtic Heritage Construction LimitedBuilders
- 31 High ST LimitedProperty developers
- Robertson’S Property Services LtdSpecialist contractors
- Tirion Solutions LtdElectricians
- Melltd LtdProperty developers
What happens if Anglesey & Gwynedd Groundworks Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2026 to 30 Sep 2026 | £150 |
| 1 to 3 months late | 1 Oct 2026 to 30 Nov 2026 | £375 |
| 3 to 6 months late | 1 Dec 2026 to 28 Feb 2027 | £750 |
| More than 6 months late | From 1 Mar 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 12297609
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2019 (6 years ago)
- Registered office
- 19 Lon Cilgwyn, Caernarfon, LL55 2DQ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 3 November 2025
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Caernarfon
Other active installation companies (insulation, lifts, shutters and similar) registered in Caernarfon.
- D & M Fencing and Groundworks Contractors Ltd2024
- G A Hughes A'i Gwmni Cyfyngedig2014
- Gic Construction & Groundworks Ltd2026
- Gwasanaethau Adeiladu A Chyfleustodau WR Construction and Utility Services Limited2026
All installation companies (insulation, lifts, shutters and similar) in Caernarfon · All trades in Caernarfon · Installers across the UK
Frequently asked questions
When are Anglesey & Gwynedd Groundworks Ltd's accounts due?
Anglesey & Gwynedd Groundworks Ltd's accounts were due at Companies House on 31 August 2026 and the register shows them as overdue.
When is Anglesey & Gwynedd Groundworks Ltd's CT600 due?
The CT600 for the period to 30 November 2025 is due at HMRC by 30 November 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2026.
Is Anglesey & Gwynedd Groundworks Ltd still trading?
Anglesey & Gwynedd Groundworks Ltd is listed as active on the Companies House register (checked 13 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 Anglesey & Gwynedd Groundworks Ltd do?
Anglesey & Gwynedd Groundworks Ltd is registered under Other construction installation (SIC 43290).
How old is Anglesey & Gwynedd Groundworks Ltd?
Anglesey & Gwynedd Groundworks Ltd was incorporated on 4 November 2019, 6 years ago.
Has Anglesey & Gwynedd Groundworks Ltd won public sector contracts?
Yes. Anglesey & Gwynedd Groundworks Ltd has 5 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £199K), most recently from Cyngor Gwynedd.
What is the penalty if Anglesey & Gwynedd Groundworks 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 Anglesey & Gwynedd Groundworks Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.