- Companies
- Plumbers and heating engineers
- Taunton
- M & M Cox Limited
M & M Cox Limited
- Company number
- 05191681
- Incorporated
- 28 Jul 200422 years trading
- Registered office
- 40 ST James Buildings, ST James Street, Taunton, Somerset, TA1 1JR
- Nature of business
- Plumbing, heat and air-conditioning installation
M & M Cox Limited is a 22-year-old private limited company registered in Taunton, company number 05191681, one of 63 plumbing and heating companies in Taunton. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £9,329 (+283.6%) on the year before, to £13K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £42K against £32K owed within a year: 1.3 times cover.
- 4 employees on average during the year.
- 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 Nov 2025 | £13K | £42K | £32K | 4 | |
| 30 Nov 2024 | £3,289 | £32K | £31K | 4 | |
| 30 Nov 2023 | £65 | £21K | £24K | 4 | |
| 30 Nov 2022 | £2,098 | £31K | 4 | ||
| 30 Nov 2021 | £1,850 | £27K | £29K | 3 | |
| 30 Nov 2020 | £2,234 | £28K | £32K | 3 | |
| 30 Nov 2019 | £415 | £3,835 | £19K | £26K | 3 |
| 30 Nov 2018 | -£2,283 | £2,318 | £17K | £29K | 4 |
| 30 Nov 2017 | £5,463 | £3,989 | £20K | £28K | 3 |
| 30 Nov 2016 | £2,865 | £7,548 | £25K | £33K |
Where M & M Cox Limited is registered
The registered office is in Taunton (TA1), in the Somerset local authority area, South West. Show TA1 1JR on a map.
Other trade companies in TA1
- Pure Rinse Car Wash LimitedMechanics and garages
- Barmond Carpets and Flooring LtdFloor and wall tilers
- Ekko Cars & Commercials LtdMotor traders
- Whitmores Fencing LtdLandscapers and gardeners
- T.A.M Contracting LtdCivil engineering
- 27 Performance LimitedMotor traders
- M J Motors (SW) LimitedMechanics and garages
- Electroalpha LtdElectricians
Also registered at this address
20 other companies use the same registered office as M & M Cox Limited.
- A. Stewart Plumbing & Heating Services LimitedPlumbers and heating engineers
- Ak Shopfitting & Carpentry LimitedFinishing trades
- Atlas Scaffolding & Roofing LtdRoofers
- Billdarr Homes LimitedProperty developers
- BLC Projects LtdProperty developers
- Bouge LimitedFinishing trades
- CCW Civils LimitedProperty developers
- Elex Electrical (South West) LtdElectricians
- Fortlox Moto LtdMotor traders
- Jarex Perimeter Protection LimitedSpecialist contractors
- Masterplumb LimitedPlumbers and heating engineers
- MPG90 LimitedProperty developers
- Nick Medforth Building Contractor LimitedSpecialist contractors
- Normandy Windows LimitedPainters and decorators
- Office Revival LimitedCleaning companies
- RLS Estates LimitedProperty developers
- Ronnies Groundworks LimitedGroundworks and demolition
- Stag Decking and Landscapes LtdLandscapers and gardeners
- T H Construction (Southwest) LtdBuilders
- Village Conservatories LimitedSpecialist contractors
What happens if M & M Cox 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 05191681
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 July 2004 (22 years ago)
- Registered office
- 40 ST James Buildings, ST James Street, Taunton, Somerset, TA1 1JR
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 23 July 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Taunton
Other active plumbing and heating companies registered in Taunton.
- M P Fyfe Limited2009
- M.H. Coles Limited2006
- Mario Bathroom Installer Ltd2020
- Masterplumb Limited2005
- Mayfair Plumbing & Heating Limited2016
- MBH Industrial Services Limited1994
- Neil Robertson Plumbing and Heating Limited2008
- Nupipe Group Limited2021
All plumbing and heating companies in Taunton · All trades in Taunton · Plumbers and heating engineers across the UK
Frequently asked questions
When are M & M Cox Limited's accounts due?
M & M Cox Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is M & M Cox Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is M & M Cox Limited still trading?
M & M Cox 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 M & M Cox Limited do?
M & M Cox Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is M & M Cox Limited?
M & M Cox Limited was incorporated on 28 July 2004, 22 years ago.
What is the penalty if M & M Cox 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 M & M Cox 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.