How Much Do Composite Doors Cost in Cornwall? A Complete Price Guide

The honest answer to "how much does a composite door cost in Cornwall?" is: between £1,400 and £3,200 fully supplied and installed, depending on brand, spec and hardware. This guide breaks down exactly what drives the price so you can budget properly and spot a fair quote. TYPICAL INSTALLED PRICES IN CORNWALL (2026) Entry-level branded composite door (standard colour, obscure glazing, standard hardware): £1,400-£1,700 installed. Mid-range door (Solidor / Endurance in a colour choice, decorative glazing, three-star cylinder): £1,900-£2,400 installed. Premium door (Solidor Italia collection or Rockdoor Ultimate, triple glazing, chrome or brushed marine-grade hardware, side panel): £2,600-£3,200 installed. Coastal-spec upgrade (marine-grade stainless hardware, upgraded weather seals, salt-resistant handles): add £120-£220. WHAT DRIVES THE PRICE Brand: Solidor, Endurance and Rockdoor sit at the premium end and cost 15-25 percent more than budget composite ranges — but the slab construction, warranty and long-term colour retention justify it in a coastal environment. Slab thickness: 44 mm slabs (Solidor) command a premium over 48 mm expanded-core slabs. Both perform well; solid timber cores hold hardware more firmly over time. Glazing: single-pane obscure glass is cheapest. Decorative leaded, stained or bevelled glazing adds £150-£450. Triple glazing typically adds £180-£280. Hardware: standard chrome handle set is included. Upgrading to brushed graphite, antique brass or marine-grade stainless typically adds £80-£180. A three-star anti-snap cylinder should be standard on any door over £1,600. Frame and cill: a new outer frame, cill and threshold in matching colour is normally included on a full replacement. Retaining an existing frame is not recommended — the frame is half the security and half the weather sealing. Side panels and top lights: a side panel adds £350-£700 depending on glazing. A top light (over-door glazed panel) adds £250-£500. INSTALLATION IS PART OF THE PRICE A properly quoted installation in Cornwall includes: survey, removal of the existing door and frame, disposal, fitting of new frame with packers and fixings at correct centres, sealing internally and externally, hardware setup, key handover and a written guarantee. Expect installation itself to represent £350-£550 of the total cost. WHAT SHOULD MAKE YOU WALK AWAY Quotes under £1,200 fully installed almost always mean unbranded slabs, single-glazed obscure panels, no PAS24 certification, and installer margins so thin the aftercare will not exist. Extremely high quotes (£3,500+) for a standard front door with no side panel are usually inflated door-to-door sales pricing. GETTING A FAIR QUOTE Ask for the door brand and model in writing, the glass specification (double or triple, warm-edge spacer, obscurity level), the hardware brand, the cylinder rating (three-star anti-snap), the frame reinforcement and the installer's Certass or FENSA registration number. A reputable Cornwall installer will provide all of that on a printed quote without hesitation.