S Mahoney Carpentry & Joinery Limited
Window & double glazing company registered in Watford, Hertfordshire
Registered address
OFFICE G5, OTTERSPOOL WAY, Watford WD25 8HR
✓ Active on Companies House
Companies House number17193396
IncorporatedMay 2026
0 years on the register
0 years on the register
Company typePrivate Limited Company
Trade (SIC 43320)Joinery installation (windows, doors & frames)
Accounts on fileNo accounts filed yet · next due February 2028
Also registered for43290 - Other construction installation
Listed from the public Companies House register, not an endorsement. Quote requests go to FENSA or Certass registered installers covering your postcode, not necessarily this company. Accounts filing category reflects company size under Companies House rules, not service quality. Map location is approximate, based on the registered postcode.
Before you book S Mahoney Carpentry & Joinery Limited
This page confirms the company is on the Companies House register. It does not confirm FENSA or Certass registration, insurance, or trading status. Check those yourself first.
How to vet a window installer before you hire →Need a window installer in Watford?
Free, no-obligation quotes from FENSA or Certass registered installers near you.
Get Free Quotes →Window help for Watford
How much does window replacement cost in Watford?
A single uPVC window in Watford typically runs £300 to £600 supplied and fitted; a full house of 8 to 10 windows is often £3,000 to £8,000 depending on style (casement, bay, sash-look) and glazing spec. Get two or three written, itemised quotes before agreeing to work.
Can I see reviews for S Mahoney Carpentry & Joinery Limited?
Not here. This is a register-based directory, not a review site. Look at independent review platforms, ask the installer for recent local references, and confirm FENSA or Certass registration before any work starts.
What is a FENSA or Certass certificate and why does it matter?
It's proof the window or door installation meets Building Regulations (thermal performance, safety glazing, ventilation) without a separate council building control sign-off. Without one, selling the property can mean paying for retrospective building control inspection or indemnity insurance, so keep the certificate with your house documents.
Does a listing here mean S Mahoney Carpentry & Joinery Limited is recommended?
No. Companies appear in this directory because they are on the Companies House register under a window/joinery installation trade code. A listing is not vetting, endorsement, or a guarantee that the company is trading or FENSA/Certass registered.