- Companies
- Plumbers and heating engineers
- Milton Keynes
- Williamson Cooling Limited
Williamson Cooling Limited
- Company number
- 06720434
- Incorporated
- 10 Oct 200818 years trading
- Registered office
- Mill House, Mill Road Bletchley, Milton Keynes, MK2 2UZ
- Nature of business
- Plumbing, heat and air-conditioning installation
Williamson Cooling Limited is a 18-year-old private limited company registered in Milton Keynes, company number 06720434, one of 197 plumbing and heating companies in Milton Keynes. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Williamson Cooling LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £26K (+28.7%) on the year before, to £114K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £152K against £82K owed within a year: 1.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £114K | £152K | £82K | 2 | |
| 31 Dec 2024 | £89K | £69K | £112K | £70K | 2 |
| 31 Dec 2023 | £131K | £79K | £107K | £49K | 2 |
| 31 Dec 2022 | £90K | £9,147 | £72K | £32K | 2 |
| 31 Dec 2021 | £56K | £9,289 | £61K | £28K | 2 |
| 31 Dec 2020 | £100K | £73K | £113K | £41K | 2 |
| 31 Dec 2019 | £77K | £141K | £85K | 2 | |
| 31 Dec 2018 | £104K | £136K | £60K | 2 | |
| 31 Dec 2017 | £65K | £136K | £83K | 2 |
Where Williamson Cooling Limited is registered
The registered office is in Milton Keynes (MK2), in the Milton Keynes local authority area, South East. Show MK2 2UZ on a map.
Other trade companies in MK2
- Ice MOT LtdMechanics and garages
- Msarra LtdSpecialist contractors
- Ray11 LimitedBuilders
- Precob Solutions LimitedBuilders
- ZF Autos LtdMechanics and garages
- Scooby Cleaning LtdCleaning companies
- Marina Automotive LtdMotor traders
- Project Atlas Group LtdMotor traders
What happens if Williamson Cooling 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 06720434
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 October 2008 (18 years ago)
- Registered office
- Mill House, Mill Road Bletchley, Milton Keynes, MK2 2UZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 11 October 2025
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 Milton Keynes
Other active plumbing and heating companies registered in Milton Keynes.
- Yardley Heating Services Limited2008
- ZH Plumbing & Heating Ltd2025
- 1ST Class Heating Repairs Limited2003
- A5H Plumbing Ltd2021
- Aa Plumbing Needs Ltd2025
- Abbey Build Conversions Ltd2016
- Able Plumbing Solutions Ltd2012
- Abode Installations Ltd2018
All plumbing and heating companies in Milton Keynes · All trades in Milton Keynes · Plumbers and heating engineers across the UK
Frequently asked questions
When are Williamson Cooling Limited's accounts due?
Williamson Cooling Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Williamson Cooling Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Williamson Cooling Limited still trading?
Williamson Cooling 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 Williamson Cooling Limited do?
Williamson Cooling Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Williamson Cooling Limited?
Williamson Cooling Limited was incorporated on 10 October 2008, 18 years ago.
What is the penalty if Williamson Cooling 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 Williamson Cooling 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.