Harmony Luthier Ltd
Window & double glazing company registered in Gravesend, Kent
Registered address
66 ST MARKS AVENUE, Gravesend DA11 9LW
✓ Active on Companies House
Companies House number17165961
IncorporatedApril 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 ยท next due January 2028
Also registered for32200 - Manufacture of musical instruments; 43220 - Plumbing, heat and air-conditioning installation; 95290 - Repair of personal and household goods n.e.c.
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 Harmony Luthier Ltd
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.
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How do I get a quote from a window installer in Gravesend?
Use the "Get Free Quotes" form on this page. Your job details go to FENSA or Certass registered installers covering the DA postcode area, who contact you directly. Gravesend has 38 registered window and glazing businesses in this directory, though the installers who quote are not necessarily among them. It is free and there is no obligation.
Do uPVC windows need any maintenance?
Not much, but not none. Wipe the frames a few times a year, lubricate hinges and locks annually, and keep the drainage channels along the bottom of the frame clear so water can't pool and find its way inside. There is no statutory annual service like a boiler needs.
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 Harmony Luthier Ltd 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.
How many window and glazing companies are there in Kent?
This directory holds 478 active window and glazing businesses across 41 towns in Kent, all from the Companies House register. Gravesend accounts for 38, among the county's busiest. About 26% of Kent's registered window and glazing firms were incorporated in the last three years, so weigh incorporation date and FENSA/Certass registration, not just company age.