- Companies
- Installers
- Alpha Building Group Ltd
Alpha Building Group Ltd
- Company number
- 09785042
- Incorporated
- 18 Sep 201511 years trading
- Registered office
- 10 Tanywaun, Penrhos, Ystradgynlais, Powys, SA9 1QY
- Nature of business
- Other construction installation
Alpha Building Group Ltd is a 11-year-old private limited company registered in Ystradgynlais, company number 09785042, one of the UK's installation companies (insulation, lifts, shutters and similar). 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 £387K (+145.4%) on the year before, to £652K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £2.5M against £1.9M owed within a year: 1.3 times cover.
- 13 employees on average, up from 4 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 | £652K | £659K | £2.5M | £1.9M | 13 |
| 31 Mar 2024 | £266K | £80K | £685K | £358K | 4 |
| 31 Mar 2023 | £147K | £376K | £222K | 3 | |
| 31 Mar 2022 | £34K | £340K | £261K | 3 | |
| 31 Mar 2021 | £37K | £284K | £256K | 1 | |
| 31 Mar 2020 | £12K | £170K | £167K | 1 | |
| 31 Mar 2019 | £9,594 | £11K | £103K | £97K | |
| 31 Mar 2018 | £840 | £4,713 | £90K | £89K | |
| 31 Mar 2017 | £100 | ||||
| 30 Sep 2016 | £100 |
Public contracts won
Alpha Building Group Ltd has 7 public sector contract awards on record; the ones with their own published value total £933K, from 2025 to 2026. Source: Contracts Finder and Find a Tender award notices. For 3 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. 6 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Rhondda Cynon Taf CBC2 awards
- University of South Wales1 award
- Caerphilly County Borough Council1 award
- LHC Procurement Group1 award
- LHC Procurement Group for the Welsh Procurement Alliance (WPA)1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Rhondda Cynon Taf CBC | Porth Community School - Re-roofing Phase One | £285K | 16 Jul 2026 |
| Rhondda Cynon Taf CBC | Trehopcyn Primary Roof Replacement Phase 1 | £157K | 15 Jul 2026 |
| University of South Wales | Award of Upgrading of Communal Extract Fans in Mountain Halls Accommodation Buildings, Treforest Campus | £142K | 8 May 2026 |
| Caerphilly County Borough Council | General Builders Reactive Maintenance, Repairs, Small Planned and Emergency Works | Ceiling, not shown | 29 Apr 2026 |
| LHC Procurement Group for the Welsh Procurement Alliance (WPA) | Roofing Systems & Associated Works | Ceiling, not shown | 14 Oct 2025 |
| LHC Procurement Group | Roofing Services & Associated Works | Ceiling, not shown | 14 Oct 2025 |
| Bridgend County Borough Council | B956 - Provision of Flat Roof Replacement to Block 1 Pencoed Comprehensive School | £350K | 11 Jul 2025 |
Where Alpha Building Group Ltd is registered
The registered office is in Ystradgynlais (SA9), in the Powys local authority area, Wales. Show SA9 1QY on a map.
Other trade companies in SA9
- Eidolon Renovations LtdPlumbers and heating engineers
- Michael Jones Renovations LtdProperty developers
- Cyfyng Road Developments LtdFinishing trades
- Orwell’S Accident Repair LtdMechanics and garages
- WLM Car and Commercial Services LtdMotor traders
- Tom Graham Maintenance LtdFinishing trades
- Precious Time Cleaning Solutions LtdCleaning companies
- TD Heating Solutions LtdPlumbers and heating engineers
What happens if Alpha Building Group 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 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
- 09785042
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 September 2015 (11 years ago)
- Registered office
- 10 Tanywaun, Penrhos, Ystradgynlais, Powys, SA9 1QY
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 17 July 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
- Previous names
- Elite Resourcing Group Ltd (until 31 Mar 2016)
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
Other active installation companies (insulation, lifts, shutters and similar).
Frequently asked questions
When are Alpha Building Group Ltd's accounts due?
Alpha Building Group Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Alpha Building Group Ltd'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 Alpha Building Group Ltd still trading?
Alpha Building Group 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 Alpha Building Group Ltd do?
Alpha Building Group Ltd is registered under Other construction installation (SIC 43290).
How old is Alpha Building Group Ltd?
Alpha Building Group Ltd was incorporated on 18 September 2015, 11 years ago.
Has Alpha Building Group Ltd won public sector contracts?
Yes. Alpha Building Group Ltd has 7 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £933K), most recently from Rhondda Cynon Taf CBC.
What is the penalty if Alpha Building Group 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 Alpha Building Group 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.