Timber French doors cost £800–£3,200 per set installed — here is what that range actually covers
The price of timber French doors in 2026 spans a wide band because the material, glazing, and joinery quality vary enormously. A single 1.2m-wide pair in softwood with basic double glazing and standard ironmongery typically costs £800–£1,200 from a trade supplier (Checkatrade UK doors cost guide, 2026). At the lower end, you are buying pine or spruce that will need repainting every two to three years.
Timber French doors cost £800–£3,200 per set installed in 2026. Softwood pairs start at £800 but need repainting every 2–3 years, while bespoke hardwood sets with triple glazing reach £3,200+.
- Timber French doors cost £800–£3,200 per set installed in 2026.
- Softwood pairs from £800 need repainting every 2–3 years.
- Hardwood mid-range (£1,200–£2,200) achieves U-value 1.4–1.6 W/m²K.
- Bespoke oak or triple-glazed sets reach £3,200+.
- Great British Insulation Scheme does not fund standard door replacements.
- Timber French doors cost £800–£3,200 per set installed — here is what that range actually covers
- Who qualifies for the Great British Insulation Scheme or ECO+ funding for French doors in 2026
- Timber French doors must meet 2026 Building Regulations Part L and Part O — here is what that means for your replacement
- Quick numbers — thermal performance, lifespan, and cost comparisons for timber French doors
- The direct answer — timber French doors offer the best aesthetic and thermal upgrade for period homes, but uPVC or aluminium outperform on cost and maintenance
- How to verify your installer — MCS, FENSA, TrustMark, and Gas Safe registration explained for timber French doors
- Planning permission and conservation areas — when timber French doors need approval in 2026
- Timber French doors vs sliding patio doors — which is better for your home in 2026
The mid-range (£1,200–£2,200) moves to hardwood species such as oak, mahogany, or accoya, with improved thermal performance (U-value around 1.4–1.6 W/m²K) and better weatherstripping (Federation of Master Builders national price survey, 2026). The upper end (£2,200–£3,200+) covers bespoke sizes, premium hardwood species, heritage-style joinery, triple glazing, and decorative glazing bars. If your opening is non-standard or you want a conservation-area match, expect to pay at the top of this range.
Who qualifies for the Great British Insulation Scheme or ECO+ funding for French doors in 2026
The Great British Insulation Scheme (formerly ECO+) does not fund standard timber French door replacements. It targets primary insulation measures — loft, cavity wall, and solid wall insulation — plus draught-proofing and secondary glazing for doors, but only for low-income households or properties with an Energy Performance Certificate (EPC) band D–G that meet local authority eligibility criteria (GOV.UK Great British Insulation Scheme eligibility, 2026).
The Boiler Upgrade Scheme (BUS) covers heat pumps and biomass boilers only, not doors. If you are replacing a single-glazed timber door with a double-glazed timber French door, you will need to fund it yourself unless you qualify for local authority discretionary grants — check your council’s website for any eco-replacement schemes specific to your area.
Timber French doors must meet 2026 Building Regulations Part L and Part O — here is what that means for your replacement
Part L (conservation of fuel and power) requires new or replacement doors to have a U-value of no more than 1.8 W/m²K for a standard door set, or 1.6 W/m²K for a door with more than 50% glazing (HM Government Approved Document L, 2025 edition in force 2026). Most timber French doors with double glazing meet this, but triple glazing improves it further to around 1.2 W/m²K.
Part O (overheating) does not directly apply to doors, but if the French doors are part of a larger glazed area — for example, in a garden room extension — the overall glazing-to-floor ratio must be checked (Approved Document O, 2025 edition). Even for a straightforward replacement (not a new opening), you must use a FENSA-registered installer or apply for building control approval separately (GOV.UK Building regulations for doors and windows, 2026).
Quick numbers — thermal performance, lifespan, and cost comparisons for timber French doors
| Door type | Typical U-value (W/m²K) | Average installed cost (2026) |
|---|---|---|
| Softwood French doors (pine) | 1.6–1.8 | £800–£1,200 |
| Hardwood French doors (oak) | 1.4–1.6 | £1,400–£2,200 |
| Premium hardwood (accoya, iroko) | 1.2–1.4 | £2,000–£3,200 |
| Aluminium French doors (comparison) | 1.0–1.4 | £1,500–£3,000 |
| uPVC French doors (comparison) | 1.2–1.6 | £600–£1,500 |
Source: Energy Saving Trust thermal performance data for doors, 2026; Checkatrade 2026 cost guide; FMB 2026 price survey. Lifespan varies: hardwood lasts 30–50 years with annual maintenance, softwood 15–25 years.
Timber French doors offer the best aesthetic and thermal upgrade for period homes, but uPVC or aluminium outperform on cost and maintenance
Timber French doors provide the highest thermal improvement for solid-wall period properties when combined with double or triple glazing, reducing heat loss by up to 40% compared to a single-glazed original door (Energy Saving Trust, 2026). They also offer superior sound insulation and natural aesthetics for period or conservation-area homes.
The trade-off is maintenance: hardwood doors need oiling or painting every 2–5 years, depending on the species and exposure. uPVC and aluminium are cheaper upfront (£600–£1,500 and £1,500–£3,000 respectively) and require no painting, but timber’s acoustic performance and visual authenticity are unmatched for older properties (Historic England guidance on timber windows and doors, 2026). If your home is in a conservation area or is a listed building, timber is often the only acceptable option.
How to verify your installer — MCS, FENSA, TrustMark, and Gas Safe registration explained for timber French doors
FENSA registration is the primary certification for door and window installers in England and Wales. A FENSA-registered installer can self-certify compliance with Building Regulations Part L and Part O, avoiding separate building control approval (FENSA, 2026). Always check the register before hiring.
TrustMark is a government-endorsed quality scheme covering all home improvement work. Installers must be TrustMark-registered to carry out work funded by the Great British Insulation Scheme or ECO+ (TrustMark, 2026). For a standard timber French door replacement, TrustMark is optional but provides consumer protection.
MCS certification is not required for timber doors unless the doors are part of a renewable energy installation — this is rare for standard French doors. Gas Safe Register is irrelevant for door installation; do not confuse it with door fitting credentials. For timber doors, FENSA and TrustMark are the two registrations that matter (GOV.UK Building regulations for doors and windows, 2026).
Planning permission and conservation areas — when timber French doors need approval in 2026
Replacing an existing door with timber French doors of the same size does not usually require planning permission — it falls under permitted development for replacement doors (GOV.UK Planning permission for doors and windows, 2026). If you are enlarging the opening — for example, widening a single door to a double set — planning permission may be required, especially in conservation areas, Areas of Outstanding Natural Beauty (AONB), or listed buildings.
Listed building consent is mandatory for any change to a listed building’s doors, even like-for-like replacement (Historic England Listed building consent, 2026). Timber French doors must match the original style, glazing pattern, and ironmongery. Check your local authority’s planning portal before ordering.
Timber French doors vs sliding patio doors — which is better for your home in 2026
Timber French doors open outward (or inward) on hinges, requiring clearance space for the swing. Sliding patio doors save floor space and are better for small patios or balconies. French doors typically offer better airtightness — lower air leakage — than sliding doors, which have a thermal break at the sliding track. Energy Saving Trust data shows French doors can achieve U-values 0.2–0.4 W/m²K lower than equivalent sliding doors (Energy Saving Trust, 2026).
Sliding doors are generally more expensive for the same width — up to 20–30% more for timber sliding systems — and have fewer timber options (Glass and Glazing Federation technical data, 2026). Most sliding doors are aluminium or uPVC. If you want timber aesthetics and have space for the swing, French doors are the better choice for thermal performance and period authenticity. If your patio is narrow or you want a seamless transition to the garden, a sliding system may be more practical despite the higher cost.
Frequently Asked Questions
Installed costs range from £800–£1,200 for softwood pairs to £2,200–£3,200+ for bespoke hardwood sets, based on Checkatrade UK doors cost guide (2026). The final price depends on wood species, glazing, and joinery quality.
No, the Great British Insulation Scheme does not fund standard timber French door replacements. It targets loft, cavity wall, and solid wall insulation, plus draught-proofing for doors, only for eligible low-income households (GOV.UK, 2026).
Timber French doors must comply with Building Regulations Part L (thermal performance) and Part O (overheating) in 2026. A U-value of 1.4 W/m²K or lower is typical for new hardwood doors.
Usually no, if the doors are a like-for-like replacement. However, if your property is in a conservation area or listed, you may need planning permission or listed building consent — check with your local planning authority.
Softwood doors last 15–20 years with regular repainting every 2–3 years. Hardwood doors (oak or accoya) can last 30+ years with proper maintenance, according to the Energy Saving Trust.
