- Companies
- Installers
- Watford
- S Mahoney Carpentry & Joinery Limited
S Mahoney Carpentry & Joinery Limited
- Company number
- 17193396
- Incorporated
- 1 May 2026
- Registered office
- Office G5, Otterspool Way, Watford, Hertfordshire, WD25 8HR
- Nature of business
- Other construction installation; Joinery installation
S Mahoney Carpentry & Joinery Limited is a newly incorporated private limited company registered in Watford, company number 17193396, one of 80 installation companies (insulation, lifts, shutters and similar) in Watford. Its next accounts are due at Companies House on 1 February 2028, and its first CT600 is due at HMRC on 30 April 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Who runs and owns S Mahoney Carpentry & Joinery Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| S*** M*** | Director | May 2026 |
Person with significant control
Where S Mahoney Carpentry & Joinery Limited is registered
The registered office is in Watford (WD25), in the Hertsmere local authority area, East of England. Show WD25 8HR on a map.
Other trade companies in WD25
- Ardel Construction LimitedBuilders
- Velocity Mechanical LtdPlumbers and heating engineers
- Jpjcm LimitedFinishing trades
- Mix & Go LtdSpecialist contractors
- Colney Prestige Autos LtdMotor traders
- Prestige Garden Services LtdLandscapers and gardeners
- Destinyd LtdMachinery repair and installation
- Leaf Space LimitedFinishing trades
Also registered at this address
5 other companies use the same registered office as S Mahoney Carpentry & Joinery Limited.
- Allen Property Maintenance LimitedPlumbers and heating engineers
- Lanigan (London) LimitedBuilders
- Lanigan Developments LimitedBuilders
- R and B Cabling LimitedInstallers
- Randalls Maintenance LtdFinishing trades
What happens if S Mahoney Carpentry & Joinery 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 1 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Feb 2028 to 1 Mar 2028 | £150 |
| 1 to 3 months late | 2 Mar 2028 to 1 May 2028 | £375 |
| 3 to 6 months late | 2 May 2028 to 1 Aug 2028 | £750 |
| More than 6 months late | From 2 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 17193396
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2026
- Registered office
- Office G5, Otterspool Way, Watford, Hertfordshire, WD25 8HR
- Nature of business
- Other construction installation (SIC 43290)
Joinery installation (SIC 43320) - Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 in Watford
Other active installation companies (insulation, lifts, shutters and similar) registered in Watford.
- S.C.G. Construction Limited2007
- SD Boize & Co Ltd2019
- Servicefill Limited2014
- Sol Glass Ltd2024
- Sol Tiling Ltd2021
- Speedy Garage Doors Ltd2020
- Spinetail Ltd2022
- Timberfusion Limited2009
All installation companies (insulation, lifts, shutters and similar) in Watford · All trades in Watford · Installers across the UK
Frequently asked questions
When are S Mahoney Carpentry & Joinery Limited's accounts due?
S Mahoney Carpentry & Joinery Limited's next accounts are due at Companies House by 1 February 2028 (in 476 days), covering the period to 31 May 2027.
When is S Mahoney Carpentry & Joinery Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 April 2027, due by 30 April 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is S Mahoney Carpentry & Joinery Limited still trading?
S Mahoney Carpentry & Joinery 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 S Mahoney Carpentry & Joinery Limited do?
S Mahoney Carpentry & Joinery Limited is registered under Other construction installation (SIC 43290); Joinery installation (SIC 43320).
How old is S Mahoney Carpentry & Joinery Limited?
S Mahoney Carpentry & Joinery Limited was incorporated on 1 May 2026, less than a year ago.
Who runs S Mahoney Carpentry & Joinery Limited?
S Mahoney Carpentry & Joinery Limited has 1 active director, the longest-serving appointed in May 2026. Their names and service addresses are on the Companies House register.
Who owns S Mahoney Carpentry & Joinery Limited?
One person or company has significant control of S Mahoney Carpentry & Joinery Limited: an individual (owns 75% or more of the shares).
What is the penalty if S Mahoney Carpentry & Joinery 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 S Mahoney Carpentry & Joinery 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.