High Grade Projects Ltd
Window & double glazing company registered in Southampton, Hampshire
Registered address
87 ROWNHAMS ROAD, NORTH BADDESLEY, Southampton SO52 9ES
✓ Active on Companies House
Companies House number12805963
IncorporatedAugust 2020
6 years on the register
6 years on the register
Company typePrivate Limited Company
Trade (SIC 43320)Joinery installation (windows, doors & frames)
Accounts on fileMicro-entity accounts (smallest filing band) · last filed August 2025 · next due May 2027
Also registered for41100 - Development of building projects
Previously namedHigh Grade Carpentry Limited (until January 2025)
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 High Grade Projects 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.
How to vet a window installer before you hire →Need a window installer in Southampton?
Free, no-obligation quotes from FENSA or Certass registered installers near you.
Get Free Quotes →Window help for Southampton
Is High Grade Projects Ltd FENSA or Certass registered?
This directory does not confirm registration. Window and door installers self-certify their work against Building Regulations through a Competent Person Scheme — mainly FENSA or Certass — so check the company name or postcode (SO52 9ES) directly on the FENSA or Certass website before booking, and ask to see the certificate number.
Is new double glazing covered by a warranty?
uPVC frames typically carry a 10 year manufacturer or insurance-backed guarantee, and sealed glazed units are usually guaranteed separately for 5 to 10 years against misting. Register the guarantee after installation and keep the FENSA or Certass certificate — a buyer's solicitor will ask for it if you sell the property.
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 High Grade Projects 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 Hampshire?
This directory holds 654 active window and glazing businesses across 74 towns in Hampshire, all from the Companies House register. Southampton accounts for 106, among the county's busiest. About 33% of Hampshire'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.