Wood Waste Skip Cost UK 2026: Clean vs Treated Timber Pricing
Wood is treated differently in the UK waste-handling system depending on whether it is clean or contaminated with paint, varnish, adhesive, or preservative. The Environment Agency's grading system runs from A (clean unpainted recycled wood, the most valuable) to D (hazardous wood, the most expensive to dispose of). The grading determines the disposal route and therefore the cost: grade A and B wood goes to biomass fuel or chipping at near-zero gate fee; grade C and D wood routes to specialist incineration or contained landfill at materially higher cost.
For a typical UK construction or domestic renovation, wood-only skip pricing as of May 2026 sits at £140 to £250 for a 6-yard of clean grade A/B wood. Adding treated wood (painted, varnished, MDF, melamine) triggers a surcharge of typically £20 to £50 per skip. Pressure-treated outdoor timber from pre-2006 structures may attract a hazardous-waste surcharge or need separate disposal entirely because of historic CCA (copper chrome arsenic) preservative residues. Modern post-2006 pressure-treated timber (ACQ or copper azole) typically falls under standard treated-wood handling.
For projects generating significant wood waste (a kitchen strip-out with old units, a deck lift, a shed demolition, a renovation with floor lift), a dedicated wood-only skip often saves money over a mixed skip plus separately disposing of segregated wood. The saving is largest when the wood is mostly clean grade A or B, smallest when it is a mix of treated and untreated where the surcharge applies.
UK Wood Waste Grading and Pricing Impact
| Grade | Description | Disposal route | Cost impact |
|---|---|---|---|
| A | Clean recycled wood (pallets, untreated softwood, untreated hardwood) | Wood chipping (animal bedding, mulch) | Cheapest |
| B | Untreated construction off-cuts, mixed clean timber, OSB, plywood (uncontaminated) | Biomass fuel or chipping | Cheap |
| C | Painted, varnished, MDF, melamine, particleboard, mixed treated | Specialist biomass with emissions control | Surcharge £20-50 |
| D | Pre-2006 pressure-treated outdoor timber (CCA preservative) | Hazardous waste incineration | Separate disposal |
Grades follow the Wood Recyclers' Association classification widely adopted across UK waste operators. Grade C is the most common cause of unexpected surcharges; declare any painted, varnished, or MDF content at booking.
What Goes in a Wood-Only Skip
Clean wood (no surcharge)
- Construction off-cuts (joists, rafters, studs)
- Untreated softwood and hardwood
- Pallets (clean, no significant nail contamination)
- OSB and plywood (uncontaminated)
- Solid timber furniture (untreated finish)
- Untreated fence panels and posts
- Untreated decking offcuts
- Clean garden timber and bare wood logs
Treated wood (surcharge applies)
- Painted timber (paint adds VOC content)
- Varnished timber and lacquered finishes
- MDF (medium-density fibreboard, adhesive-bonded)
- Melamine particleboard (kitchen unit carcasses)
- Hardboard with adhesive coating
- Plywood with melamine or vinyl facing
- Modern (post-2006) pressure-treated outdoor timber
- Engineered wood with chemical-bonded composites
Hazardous (separate disposal)
- Pre-2006 pressure-treated outdoor timber (CCA preservative)
- Tanalised decking from pre-2006 builds (CCA preservative)
- Old railway sleepers (creosote-treated)
- Marine pilings (heavy preservatives)
- Lead-paint timber (pre-1970s paint)
- Asbestos-cement-faced wood panels
Why Clean Wood Is Cheaper to Dispose Of
Clean grade A and B wood has commercial value at the end-of-life stage. UK biomass plants pay for clean wood feedstock to generate electricity under the Renewables Obligation and Contracts for Difference schemes; wood-chip processors pay for clean stock to produce animal bedding and garden mulch. The transfer station that accepts your wood-only skip receives a positive net return on grade A/B wood, which is why the operator can offer a wood-only skip below the mixed-waste price.
Grade C wood (painted, varnished, MDF, melamine) is also accepted at biomass plants but with emissions control because of the volatile organic compounds released on combustion. This adds processing cost downstream, which the operator passes back as a surcharge. The surcharge is not punitive; it reflects the genuine higher cost of dealing with VOC-emitting wood feedstock.
Grade D hazardous wood (predominantly CCA-treated outdoor timber from before 2006, when the CCA preservative was withdrawn for residential use in the UK) cannot go to standard biomass plants because of arsenic content. It routes to specialist hazardous-waste incineration or contained landfill, which costs an order of magnitude more per tonne. Always check the age of any outdoor pressure-treated timber before assuming standard wood-skip handling applies.
Projects That Suit a Wood-Only Skip
New-build off-cut clearance
Construction off-cuts from a new-build or extension are almost entirely clean grade B wood. A dedicated wood-only skip running alongside a mixed skip captures the saving cleanly. Common on building sites.
Pallet clearance
Industrial or warehouse pallet build-up clears at lower cost via wood-only because pallets are pure grade A. Many operators offer wood-only skips at competitive rates for pallet-heavy generators.
Old shed and outbuilding strip
Wooden shed demolition is typically a mix: clean structural timber (grade A/B) plus weathered painted or treated cladding (grade C). Wood-only skip with declared mix and surcharge.
Kitchen unit strip-out
Kitchen unit carcasses are predominantly melamine particleboard (grade C). A wood-only skip with treated-wood surcharge typically beats mixed-waste skip pricing for a full kitchen strip.
Old deck lift
Modern (post-2006) decking lifts cleanly as grade C wood with surcharge. Pre-2006 Tanalised decking is grade D hazardous and needs separate disposal; check age before booking.
Fence panel replacement
Replacing fence panels generates a mix of clean structural posts and treated panel boards. Most modern (post-2006) treated panels go through grade C wood-only with surcharge. Older fences may have CCA-treated components requiring hazardous routing.
Metalwork in Wood Waste
Wood with significant metal still attached (door frames with hinges and locks, fence panels with brackets, old furniture with screws and brackets) is acceptable in a wood-only skip up to incidental level. Significant metalwork (substantial nails, brackets, fittings) needs separate metal handling at the transfer station, sometimes with a small additional fee. For pure metal items (radiators, copper pipe, scrap), a metal-only skip or scrap-metal merchant pays for the material and is the right route, not a wood skip.
Frequently Asked Questions
How much does a wood-only skip cost in the UK?
A wood-only 6-yard skip costs £140 to £250 nationally as of May 2026 for clean untreated timber. Mixed treated and painted timber typically attracts a £20 to £50 surcharge because it routes to specialist higher-cost disposal. Pressure-treated (Tanalised) timber from outdoor structures may attract a higher surcharge or require a separate skip because of CCA (copper chrome arsenic) historic preservative residues.
What is the difference between clean and treated wood?
Clean wood is unpainted, unvarnished, untreated timber, typically construction off-cuts, pallets, joists, and natural-finish furniture. It is classified as grade A or B wood waste and routes to wood-chipping (for animal bedding, garden mulch) or biomass fuel. Treated wood is varnished, painted, MDF, melamine, particleboard with adhesives, or pressure-treated outdoor timber. It is classified as grade C or D and routes to specialist incineration or contained landfill at much higher cost because of chemical content.
Can pressure-treated decking go in a wood-only skip?
Modern pressure-treated decking (post-2006, using ACQ or copper azole preservatives) typically goes in a wood-only skip at standard treated-wood pricing. Older pressure-treated timber (pre-2006, using CCA preservative containing arsenic) is classified as hazardous waste and must be handled separately. If your decking, fencing, or outdoor timber predates 2006 and you cannot confirm what preservative was used, treat it as hazardous and arrange specialist disposal, not a standard wood skip.
What can go in a wood-only skip?
Standard wood-only skip contents: pallets, untreated softwood and hardwood off-cuts, construction joists and rafters (untreated), shed and fence panels (untreated), garden timber (untreated), broken untreated furniture, plywood (uncontaminated), OSB sheet material. Excluded: MDF and melamine particleboard (adhesive-bound, separate route), painted or varnished timber (treated wood surcharge), pressure-treated outdoor timber (treated surcharge or hazardous if pre-2006), any timber with metal still attached (separate, fasteners need extraction).
Is a wood-only skip cheaper than a mixed skip?
Clean wood-only skips are typically 10 to 20 per cent cheaper than the equivalent mixed-waste skip because clean wood is a saleable feedstock for chipping and biomass routes. Treated or mixed-treatment wood-only skips are typically similar to mixed-waste pricing because the disposal cost downstream is higher. For projects generating mostly clean construction off-cuts, the saving is real and worth segregating.