Replacing a Window Sill Costs

In This Article

• Average Cost of Window Sill Replacement
• Types of Window Sills and Their Benefits
• Labour Costs and Time Estimates
• Supply Only Costs
• Additional Costs and Considerations
• FAQs

Average Cost of Window Sill Replacement

The cost of replacing a window sill varies depending on the material, location, and complexity of the job. Typically, it takes 1.5 to 3 hours to complete the installation. Here is a breakdown of the average costs in the UK:

Types of Window Sills and Their Benefits

PVC Window Sills

• Cost: £15-£40
• Pros: Affordable, moisture-resistant, durable, and available in various finishes and colours. Ideal for replicating stone or wood aesthetics.
• Cons: Limited load capacity, risk of formaldehyde in lower-quality options, potential to warp under extreme heat.

Stone Window Sills

• Cost: £90-£120
• Pros: Long-lasting, beautiful, and capable of adding property value. Available in many colours and styles, stone can enhance a home’s aesthetic.
• Cons: Expensive, prone to scratching and cracking, requires care against paint and acidic spills.

Wood Window Sills

• Cost: £20-£60
• Pros: Classic look, insulating properties, and easy to customise. Timber sills can be painted or stained to fit various decor styles.
• Cons: Susceptible to rot without maintenance, and vulnerable to moisture and humidity damage. Consider using treated wood or engineered options.

Concrete Window Sills

• Cost: £120-£180
• Pros: Highly durable, weather-resistant, and offers a contemporary look. Suitable for both indoor and outdoor use.
• Cons: Heavy and costly, not suitable for all interior styles, and can be prone to cracks if not properly maintained.

MDF Window Sills

• Cost: £10-£20
• Pros: Low-cost, easy to paint or customise, and widely available. Often a suitable choice for modern homes.
• Cons: Less durable than other materials, vulnerable to moisture, and may swell or warp over time.

Labour Costs and Time Estimates

Labour costs in the UK average between £15 and £25 per hour, with a typical window sill replacement taking 1.5 to 3 hours. Depending on accessibility and location, labour rates may vary:

• Average Labour Cost: £30-£75 per window sill.
• Regional Variations: Higher costs in South-East England; lower rates in Northern England, Scotland, and Northern Ireland.

Supply Only Costs

For those considering a DIY approach, below are the supply-only costs:

• PVC: £15-£40
• Stone: £90-£120
• Wood: £20-£60
• Concrete: £120-£180
• MDF: £10-£20

Additional Costs and Considerations

New Window Installation

Replacing windows along with the sill can be convenient and cost-effective. Typical UK prices:

• Single Window Replacement: £500-£2,000
• 4 Casement Windows: £2,000-£2,250
• 8 Windows: £3,500-£4,000

Resealing Windows

Resealing can prevent air leaks and improve energy efficiency. Resealing costs vary depending on window size:

• Small Window: £25-£50
• Medium Window: £35-£60
• Large Window: £55-£80
• uPVC Door Seal Replacement: £45-£70

Location Factors

Costs may be affected by:

• Region: Labour costs tend to be higher in the South-East and London.
• Accessibility: Difficult-to-reach areas may add to labour time and cost.

FAQ's

Can I Replace a Window Sill Myself?

Yes, window sill replacement can be a DIY project. If you are comfortable with tools and follow safety guidelines, DIY can save on labour costs. Always consult product guidelines and use protective gear.

Do I Need Planning Permission?

No, you do not need planning permission for a window sill replacement alone. However, if it’s part of larger renovations, consult your local council. Learn more on the UK Planning Portal.

How Often Should I Replace Window Sills?

Generally, a well-maintained window sill can last 20-30 years. However, factors like material, exposure to elements, and maintenance affect this timeframe.

How Do I Choose the Right Window Sill Material?

Consider your budget, desired aesthetic, and location (indoor vs outdoor). For a cost-effective, moisture-resistant option, go with PVC. Stone suits high-end designs, while wood works well in traditional settings but requires maintenance.

For more information on planning permissions and regulations, visit the UK Planning Portal.