- Companies
- Electricians
- Welwyn Garden City
- CBM Group Ltd
CBM Group Ltd
- Company number
- 08513931
- Incorporated
- 2 May 201313 years trading
- Registered office
- 10-11 Tewin Court, Welwyn Garden City, Hertfordshire, AL7 1AU
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other building completion and finishing
CBM Group Ltd is a 13-year-old private limited company registered in Welwyn Garden City, company number 08513931, one of 50 electrical contractors in Welwyn Garden City. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £660K (+219.9%) on the year before, to £960K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £2.8M against £2.4M owed within a year: 1.1 times cover.
- 20 employees on average, up from 18 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 May 2025 | £960K | £1.6M | £2.8M | £2.4M | 20 |
| 31 May 2024 | £300K | £914K | £1.2M | £1.4M | 18 |
| 31 May 2023 | £40K | £23K | £960K | £1.3M | 14 |
| 31 May 2022 | £39K | £64K | £380K | £675K | 15 |
| 31 May 2021 | £43K | £83K | £349K | £554K | 18 |
| 31 May 2020 | £42K | £263K | £574K | £701K | 10 |
| 31 May 2019 | £701 | £66K | £361K | £454K | |
| 31 May 2018 | £32K | £95 | £257K | £313K | |
| 31 May 2017 | £32K | £89 | £233K | £288K | |
| 31 May 2016 | £36K | £377K | £421K |
Public contracts won
CBM Group Ltd has 14 public sector contract awards on record; the ones with their own published value total £1.6M, from 2024 to 2026. Source: Contracts Finder and Find a Tender award notices. For 12 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. 10 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Stevenage Borough Council5 awards
- Fusion 21 Foundation1 award
- Procurement for Housing1 award
- Echelon Consultancy1 award
- Cambridgeshire County Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Fusion 21 Foundation | Responsive Repairs & Void Property Framework (2026-30) | Ceiling, not shown | 7 Sep 2026 |
| Procurement for Housing | PfH - Responsive Repairs, Disrepair Works and Void Services | Ceiling, not shown | 15 Jul 2026 |
| Echelon Consultancy | Maintain Framework | Ceiling, not shown | 30 Apr 2026 |
| Cambridgeshire County Council | 25008 Cambridgeshire County Council Minor Works Framework Covering Building Fabric and Mechanical and Electrical Work | Ceiling, not shown | 27 Mar 2026 |
| Notting Hill Genesis | NHG Empty Homes (Voids) Refurbishment Works Framework | Ceiling, not shown | 16 Mar 2026 |
| Cambridge City Council | CHIA - Kitchens and Bathrooms | Ceiling, not shown | 17 Nov 2025 |
| Stevenage Borough Council | SBC 1224 Housing Responsive Maintenance and Void Property Works | Ceiling, not shown | 30 Jul 2025 |
| NHMF (NPC) Limited | NHMF Frameworx Planned Maintenance, Net Zero carbon and Passive Fire Safety Works Framework Agreements Version 8 2025 | Ceiling, not shown | 23 Jul 2025 |
| Metropolitan Thames Valley Housing Limited | 2025-2026-001 Keyworker Kitchen Replacement | £1.1M | 3 Jul 2025 |
| Central Bedfordshire Council | CBC-1773-T-TS Installation of Kitchens and Bathrooms to Housing properties 2025.6 | £480K | 13 Jun 2025 |
Showing the 10 most recent of 14.
Where CBM Group Ltd is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 1AU on a map.
Other trade companies in AL7
- Mechanicalwise LtdInstallers
- Azalea Services LimitedSpecialist contractors
- Malmech and Mannion LimitedMechanics and garages
- T&D Construction Group LtdFinishing trades
- Vertec Roofing and Building LtdRoofers
- Selectlane LtdMotor traders
- Af Pressure Washing LtdCleaning companies
- Jet Professional LtdCleaning companies
What happens if CBM 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 08513931
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 May 2013 (13 years ago)
- Registered office
- 10-11 Tewin Court, Welwyn Garden City, Hertfordshire, AL7 1AU
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other building completion and finishing (SIC 43390) - Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 12 May 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
- Previous names
- CBM Electrical Contractors Limited (until 3 Jul 2019)
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Welwyn Garden City
Other active electrical contractors registered in Welwyn Garden City.
- Coughlan Electrical Services Limited2015
- CPJ Electrical Services Ltd2024
- Crown Contracts Limited1986
- D Crashaw Limited2017
- Drewmin Services Limited2019
- Ekelectrics Limited2015
- Elec Comply Ltd2024
- Eleven 92 Lighting Ltd.2017
All electrical contractors in Welwyn Garden City · All trades in Welwyn Garden City · Electricians across the UK
Frequently asked questions
When are CBM Group Ltd's accounts due?
CBM Group Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is CBM Group Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is CBM Group Ltd still trading?
CBM Group 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 CBM Group Ltd do?
CBM Group Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other building completion and finishing (SIC 43390).
How old is CBM Group Ltd?
CBM Group Ltd was incorporated on 2 May 2013, 13 years ago.
Has CBM Group Ltd won public sector contracts?
Yes. CBM Group Ltd has 14 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.6M), most recently from FUSION 21 FOUNDATION.
What is the penalty if CBM 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 CBM Group 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.