- Companies
- Plumbers and heating engineers
- Watford
- Brian Dumbleton & Sons Limited
Brian Dumbleton & Sons Limited
- Company number
- 01109214
- Incorporated
- 18 Apr 197353 years trading
- Registered office
- Suite 7A, Building 6, Croxley Park, Hatters Lane, Watford, Hertfordshire, WD18 8YH
- Nature of business
- Plumbing, heat and air-conditioning installation
Brian Dumbleton & Sons Limited is a 53-year-old private limited company registered in Watford, company number 01109214, one of 124 plumbing and heating companies in Watford. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £712 (+3.3%) on the year before, to -£21K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £38K against £60K owed within a year: 0.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Aug 2025 | -£21K | £6,330 | £38K | £60K | 0 |
| 31 Aug 2024 | -£21K | £2,253 | £40K | £63K | 3 |
| 31 Aug 2023 | -£15K | £12K | £39K | £57K | 3 |
| 31 Aug 2022 | -£20K | £5,294 | £32K | £55K | 3 |
| 31 Aug 2021 | -£12K | £5,682 | £37K | £53K | 2 |
| 31 Aug 2020 | -£11K | £11K | £39K | £57K | 4 |
| 31 Aug 2019 | -£23K | £7,938 | £29K | £60K | |
| 31 Aug 2018 | -£3,716 | £1,585 | £24K | £39K | |
| 31 Aug 2017 | £4,511 | £29K | £44K | ||
| 31 Aug 2016 | £9,919 | £4,588 | £35K | £44K |
Who runs and owns Brian Dumbleton & Sons Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (4)
| Name | Role | Appointed |
|---|---|---|
| D*** D*** | Director | before Feb 1993 |
| M*** D*** | Director | Jun 2022 |
| P*** D*** | Director | Jun 2022 |
| V*** D*** | Secretary | Sep 2007 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| F*** D*** | Secretary | Aug 2007 | |
| B*** D*** | Director | Jun 2022 | |
| F*** D*** | Director | Jul 1999 |
Person with significant control
Where Brian Dumbleton & Sons Limited is registered
The registered office is in Watford (WD18), in the Three Rivers local authority area, East of England. Show WD18 8YH on a map.
Other trade companies in WD18
- Aston Contractors LimitedInstallers
- Basky 613 LtdProperty developers
- M&E Motors LtdMotor traders
- Jeservicesgroup LtdBuilders
- RCK’S Car Wash Ltd LtdMechanics and garages
- S Buildx LtdBuilders
- CDP Mechanical Contracting LtdPlumbers and heating engineers
- Lane Commercial LtdCivil engineering
Also registered at this address
11 other companies use the same registered office as Brian Dumbleton & Sons Limited.
- A C Solutions Group LimitedPlumbers and heating engineers
- Alx Construction LtdBuilders
- Courtgate LimitedProperty developers
- Federal & European Group LimitedProperty developers
- Greenhurst Homes LimitedProperty developers
- Heath End Ventures LimitedProperty developers
- Id Estates LimitedProperty developers
- Idh Estates and Developments LimitedProperty developers
- Key Property (Herts) LtdProperty developers
- Parcell and Clayford Homes LtdBuilders
- Shield (U.K.) LimitedSpecialist contractors
What happens if Brian Dumbleton & Sons 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 01109214
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 April 1973 (53 years ago)
- Registered office
- Suite 7A, Building 6, Croxley Park, Hatters Lane, Watford, Hertfordshire, WD18 8YH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 16 January 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 Watford
Other active plumbing and heating companies registered in Watford.
- Byfield Homes Ltd2019
- Carbon Rewind Insulation Ltd2021
- Carbon Rewind Renewables Ltd2021
- CDP Mechanical Contracting Ltd2026
- Charlie Pay Plumbing Services Ltd2019
- City Water Solutions Ltd2020
- Coldquest Ltd2026
- Compson19 Ltd2017
All plumbing and heating companies in Watford · All trades in Watford · Plumbers and heating engineers across the UK
Frequently asked questions
When are Brian Dumbleton & Sons Limited's accounts due?
Brian Dumbleton & Sons Limited's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Brian Dumbleton & Sons Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Brian Dumbleton & Sons Limited still trading?
Brian Dumbleton & Sons 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 Brian Dumbleton & Sons Limited do?
Brian Dumbleton & Sons Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Brian Dumbleton & Sons Limited?
Brian Dumbleton & Sons Limited was incorporated on 18 April 1973, 53 years ago.
Who runs Brian Dumbleton & Sons Limited?
Brian Dumbleton & Sons Limited has 3 active directors, the longest-serving appointed in Jun 2022. Their names and service addresses are on the Companies House register.
Who owns Brian Dumbleton & Sons Limited?
One person or company has significant control of Brian Dumbleton & Sons Limited: an individual (owns 75% or more of the shares).
What is the penalty if Brian Dumbleton & Sons 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 Brian Dumbleton & Sons 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.