- Companies
- Installers
- Carmarthen
- Dyfed Alarms Limited
Dyfed Alarms Limited
- Company number
- 03764103
- Incorporated
- 4 May 199927 years trading
- Registered office
- Dyfed Alarms Ltd Old ST. Clears Road, Johnstown, Carmarthen, SA31 3HL
- Nature of business
- Other construction installation; Security systems service activities
Dyfed Alarms Limited is a 27-year-old private limited company registered in Carmarthen, company number 03764103, one of 14 installation companies (insulation, lifts, shutters and similar) in Carmarthen. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 down £21K (-20.9%) on the year before, to £78K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £274K against £468K owed within a year: 0.6 times cover.
- 16 employees on average, down from 17 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | £78K | £30K | £274K | £468K | 16 |
| 30 Jun 2024 | £99K | £26K | £308K | £456K | 17 |
| 30 Jun 2023 | £132K | £25K | £322K | £447K | 18 |
| 30 Jun 2022 | £106K | £11K | £247K | £385K | 21 |
| 30 Jun 2021 | £33K | £99K | £271K | £470K | 17 |
| 30 Jun 2020 | £25K | £451 | £150K | £362K | 19 |
| 30 Jun 2019 | £34K | £528 | £189K | £436K | 20 |
| 30 Jun 2018 | £144K | £402 | £279K | £421K | 18 |
| 30 Jun 2017 | £163K | £9,806 | £282K | £409K | |
| 30 Jun 2016 | £150K | £8,899 | £319K | £457K |
Public contracts won
Dyfed Alarms Limited has 2 public sector contract awards on record; the ones with their own published value total £65K, from 2021 to 2025. 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
- Pembrokeshire County Council2 awards
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Pembrokeshire County Council | 12 Month Servicing of CCTV for Pembrokeshire County Council | £65K | 18 Jun 2025 |
| Pembrokeshire County Council | Servicing of Fire/Security Alarms, Emergency Lighting, Access Control, Staff Call & Refuge Alarms including installation works | Ceiling, not shown | 30 Mar 2021 |
Where Dyfed Alarms Limited is registered
The registered office is in Carmarthen (SA31), in the Carmarthenshire local authority area, Wales. Show SA31 3HL on a map.
Other trade companies in SA31
- Revworks Studio LtdMechanics and garages
- Celf Construction LimitedPlasterers
- DCM Plant Hire LimitedSpecialist contractors
- M Owen Construction LtdBuilders
- Tce Construction LtdBuilders
- LW Pro Build LtdBuilders
- PW Solar LtdElectricians
- Mark Williams Carpets LimitedFloor and wall tilers
What happens if Dyfed Alarms 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 03764103
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 May 1999 (27 years ago)
- Registered office
- Dyfed Alarms Ltd Old ST. Clears Road, Johnstown, Carmarthen, SA31 3HL
- Nature of business
- Other construction installation (SIC 43290)
Security systems service activities (SIC 80200) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 25 May 2026
- Charges (mortgages)
- 4 outstanding of 7 registered
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 Carmarthen
Other active installation companies (insulation, lifts, shutters and similar) registered in Carmarthen.
- G P Kinsey Building Services Limited2017
- K R Guest Groundworks Ltd2020
- RPW Fire Sprinklers Limited2017
- Studio Claash Limited2026
- Sylwester Construction Ltd2019
- Westcoast Doors Ltd2024
- Woodsy Shopfitting Limited2022
- Zara Interiors Limited2009
All installation companies (insulation, lifts, shutters and similar) in Carmarthen · All trades in Carmarthen · Installers across the UK
Frequently asked questions
When are Dyfed Alarms Limited's accounts due?
Dyfed Alarms Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Dyfed Alarms Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Dyfed Alarms Limited still trading?
Dyfed Alarms 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 Dyfed Alarms Limited do?
Dyfed Alarms Limited is registered under Other construction installation (SIC 43290); Security systems service activities (SIC 80200).
How old is Dyfed Alarms Limited?
Dyfed Alarms Limited was incorporated on 4 May 1999, 27 years ago.
Has Dyfed Alarms Limited won public sector contracts?
Yes. Dyfed Alarms Limited has 2 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £65K), most recently from Pembrokeshire County Council.
What is the penalty if Dyfed Alarms 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 Dyfed Alarms 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.