Sash Window Painting and Repair: What is the Total Cost for Both Projects?
Sash windows are a defining feature of period properties, offering timeless charm, ventilation control, and architectural elegance. But over time, they can suffer from flaking paint, rotten timber, draughts, or jamming sashes—leading many homeowners to ask: “How much will it cost to restore and Sash Window Painting London?”
Why Restore Sash Windows Instead of Replacing?
Before diving into costs, it’s worth understanding why sash window restoration is often the better route than replacement:
- Preserves original character, especially in listed or conservation properties.
- More cost-effective than new bespoke timber sashes.
- Improves energy efficiency with draught-proofing.
- Adds long-term value to the home.
Restoration, including painting and repair, can breathe new life into tired windows while keeping that traditional look intact.
Average Cost of Sash Window Painting
Painting sash windows requires careful preparation, skill, and the right materials—especially if you’re dealing with heritage timber or hard-to-reach upper floors.
Cost Breakdown (Per Window):
The average cost for painting a sash window starts with prep work, such as sanding and filling, which typically ranges from £40 to £70 per window. This is followed by priming and applying two to three coats of paint, which adds £60 to £100. Altogether, the total cost of painting a single sash window usually falls between £100 and £170, depending on the condition of the window and the materials used.
What Affects the Painting Cost?
- Number of sashes: Two-panel windows may cost more.
- Height of window: Upper floors frequently involve scaffolding or special tackle.
- Condition of existing paint: Flaky or lead paint requires more prep time.
- Type of paint used: Oil-based, heritage-grade or microporous paints cost more but last longer.
DIY vs Professional Painting
You could save money with DIY painting, but be aware that painting sash windows is time-consuming and fiddly. If you’re not confident removing sashes, painting while keeping them functional, or using the right products, hiring a pro is often worth the extra investment.
Average Cost of Sash Window Repair
Repair work ranges from small timber fixes to full sash overhauls. Some problems are enhancing, while others are structural or practical.
Common Repair Types & Costs:
The cost of sash window repair varies depending on the extent of the work needed. Timber filling or minor repairs typically range from £50 to £100, while replacing a sash cord usually costs £60 to £100 per cord. For improved insulation, draught-proofing and sealing services fall between £150 and £200. For a full sash overhaul, which includes rebalancing, repairs, and draught-proofing, the cost per window typically ranges from £250 to £450.
Full Repair Includes:
- Rebalancing weights
- Replacing cords and pulleys
- Draught-proofing
- Timber splice repairs
- Sealing and restoring functionality
This is especially useful for windows that are stuck shut, rattling, or letting in cold air.
Total Cost for Painting + Repair (Per Window)
If you’re restoring and repainting your sash windows at once, most companies offer bundled pricing. On average, expect:
Standard Combined Cost (Per Window):
- Minor Repair + Painting: £180 – £250
- Moderate Repair + Painting: £250 – £400
- Full Overhaul + Painting: £400 – £600
Other Cost Considerations
Access & Scaffolding
Upper-storey windows can have higher costs due to access challenges. Depending on the size and number of windows, scaffolding may add £300 – £600.
Glazing Repairs
If the glass is cracked, loose, or single-glazed, you might pay:
- Glass replacement: £80 – £150 per pane
- Double-glazing retrofit: £300 – £500 per sash (specialised)
Lead Paint Removal
Older sash windows may contain lead-based paint, requiring specialist removal. This could increase prep and painting costs by 20–30%.
Is It Worth the Cost?
Absolutely—if done right.
Here’s what you gain from professionally restored sash windows:
- Better energy efficiency (especially with draught-proofing)
- Reduced external noise
- A smoother sliding mechanism
- Long-lasting protection from rot, moisture, and sun
- Preserved heritage features that boost property value
A high-quality sash window restoration can last 10–15 years or more with minimal upkeep, making it a smart long-term investment.
Tips to Keep Costs Down
Bundle your windows:
The more windows you restore in one project, the more cost-effective it becomes per unit.
Choose durable paints:
Investing in microporous or specialist exterior paints pays off by extending the time between repaints.
Final Thoughts:
Sash window painting and repair may seem like a big job, but the payoff in character, comfort, and long-term value is significant. Are you considering Sash Window Repair Near London this year? Get quotes from at least two professionals, ask about bundled services, and always check for guarantees on work and paint durability.
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