- Companies
- Property developers
- Caernarfon
- Synergy Rock Ltd
Synergy Rock Ltd
- Company number
- 16982957
- Incorporated
- 23 Jan 2026
- Registered office
- 87 Gallt Y Sil, Caernarfon, LL55 2SZ
- Nature of business
- Development of building projects; Construction of commercial buildings; Construction of domestic buildings; Construction of roads and motorways
Synergy Rock Ltd is a newly incorporated private limited company registered in Caernarfon, company number 16982957, one of 14 property development companies in Caernarfon. Its next accounts are due at Companies House on 23 October 2027, and its first CT600 is due at HMRC on 22 January 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Synergy Rock Ltd is registered
The registered office is in Caernarfon (LL55), in the Gwynedd local authority area, Wales. Show LL55 2SZ 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 Synergy Rock 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 23 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Oct 2027 to 23 Nov 2027 | £150 |
| 1 to 3 months late | 24 Nov 2027 to 23 Jan 2028 | £375 |
| 3 to 6 months late | 24 Jan 2028 to 23 Apr 2028 | £750 |
| More than 6 months late | From 24 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | 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
- 16982957
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2026
- Registered office
- 87 Gallt Y Sil, Caernarfon, LL55 2SZ
- Nature of business
- Development of building projects (SIC 41100)
Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Construction of roads and motorways (SIC 42110) - Year end
- 31 January (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Caernarfon
Other active property development companies registered in Caernarfon.
- 31 High ST Limited2026
- Adeiladau Ansawdd Arbennig Cyf2024
- Arfon Timber Frames Ltd2023
- Bocs Projects Limited2022
- Cae Glas Developments Ltd2014
- Edgar Jos Developments Ltd2025
- Ers Steel Properties Ltd2025
- Gwynedd Construction Ltd2016
All property development companies in Caernarfon · All trades in Caernarfon · Property developers across the UK
Frequently asked questions
When are Synergy Rock Ltd's accounts due?
Synergy Rock Ltd's next accounts are due at Companies House by 23 October 2027 (in 375 days), covering the period to 31 January 2027.
When is Synergy Rock Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 22 January 2027, due by 22 January 2028, and one for the period to 31 January 2027, due by 31 January 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Synergy Rock Ltd still trading?
Synergy Rock 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 Synergy Rock Ltd do?
Synergy Rock Ltd is registered under Development of building projects (SIC 41100); Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Construction of roads and motorways (SIC 42110).
How old is Synergy Rock Ltd?
Synergy Rock Ltd was incorporated on 23 January 2026, less than a year ago.
What is the penalty if Synergy Rock 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 Synergy Rock 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.