The 5 Best Windows & Doors in Pontyclun 2026

Ranked by real customer reviews, listing activity and Companies House registration, from public sources.

How this ranking is calculated

Composite score from public signals:

  • Google Business Profile star rating (when 3+ reviews)
  • Google Business Profile review count (log-scaled)
  • How many public profile links the listing carries: Companies House number, Google Business Profile, other directory profiles the business has supplied, its own website
  • Whether the listing has been claimed by its owner

No business can pay to be listed, and no reviews are fabricated. Placement is influenced by an optional paid Premium subscription, which puts a business ahead of equally-scored rivals here. Premium businesses carry a Premium badge on their own profile page and in our directory listings, but this list does not mark them.

  1. J P Windows & Conservatories Ltd is a window installer in Llantrisant, rated 4.9/5 from 100 Google reviews. Registered with Companies House (no. 04091812) and currently active. Established Google Business Profile with 10

    4.9★ (100 reviews)3 public profile links
    4.9★
    100 Google reviews

  2. Jon Thomas Windows is a window installer in Llantrisant, rated 4.8/5 from 26 Google reviews. Registered with Companies House (no. 13157585) and currently active. Verified Google Business Profile.

    4.8★ (26 reviews)3 public profile links
    4.8★
    26 Google reviews

  3. Ecoglaze UK Ltd is a window installer in Llantrisant, rated 4.7/5 from 266 Google reviews. Registered with Companies House (no. 11232932) and currently active. Established Google Business Profile with 266+ customer revie

    4.7★ (266 reviews)3 public profile links
    4.7★
    266 Google reviews
  4. Companies House registered
  5. Companies House registered

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