Arched windows add architectural character and curb appeal, but when it’s time for replacement, they come with a different price tag than standard rectangular units. The custom nature of arched windows, whether semi-circular, elliptical, or eyebrow style, means you’re dealing with specialized fabrication, materials, and installation labor. Most homeowners spend between $800 and $3,500 per arched window, though high-end custom jobs can push well past $5,000. This guide breaks down real-world pricing by window type, material, size, and labor so you can budget accurately and avoid sticker shock when quotes arrive.
Key Takeaways
- Arched window replacement cost typically ranges from $800 to $3,500 per unit for mid-to-high-end installations, with custom options exceeding $5,000.
- Semi-circular and elliptical arch styles are the most common and affordable, while full-round, Gothic, and Palladian windows command premium pricing due to fabrication complexity.
- Frame material significantly impacts price: vinyl costs $600–$1,800, wood $1,500–$4,000, and fiberglass $1,800–$3,500 per window installed.
- Size and customization drive costs upward—each 3-foot increase in width can add $2,000+, and options like Low-E glass, divided lites, and tempered glass add $75 to $800 each.
- Professional installation is essential for arched windows to avoid warranty voidance and water damage, with labor costs ranging $200 to $800 depending on location, complexity, and structural modifications.
- Plan for 6 to 12 weeks of lead time for custom arched windows, obtain multiple contractor quotes, and verify licensing before committing to installation.
Average Cost to Replace Arched Windows
For a standard arched window replacement, expect to pay $800 to $2,500 for a mid-range unit with professional installation. This typically includes a vinyl or aluminum-framed arch window in a common size (3 to 5 feet wide).
High-end custom arched windows, those with wood or fiberglass frames, specialty glass, or oversized dimensions, range from $2,500 to $5,000+ per unit. Cathedral-height installations or historic restoration projects can exceed $7,000 when you factor in scaffolding, structural modifications, and premium materials.
On the lower end, fixed arched vinyl windows (non-operable) may cost as little as $600 to $1,200 installed in simple openings. Operable units (casement-style arched windows) add $300 to $800 to the base price due to hardware and hinging mechanisms.
Keep in mind that arched windows are almost always custom-ordered. Unlike standard double-hung units available at big-box stores, arched windows require measurement, fabrication lead time (often 6 to 12 weeks), and specialized installation. That custom nature drives up both material and labor costs compared to off-the-shelf rectangular windows.
Cost Breakdown by Window Type
Different arched window styles carry distinct price points based on complexity and glass area:
Semi-Circular Arched Windows: The most common style. Expect $900 to $2,200 installed for vinyl or aluminum, $1,800 to $3,500 for wood or fiberglass. These have a perfect half-circle top and are often paired with rectangular bottom sashes.
Elliptical or Eyebrow Arches: Shallower curve, sometimes called segmental arches. Pricing runs $1,000 to $2,800 installed. The gentler curve is slightly easier to fabricate than full semi-circles, though installation complexity remains high.
Full-Round or Circle-Top Windows: True circular tops over tall vertical sashes. Budget $1,500 to $4,000 installed. These are common in Victorian or Colonial Revival homes and require precise templating to match existing openings.
Gothic or Pointed Arches: Less common, more dramatic. Costs range $2,000 to $5,000+ installed due to custom metalwork or divided lite patterns. Historic homes may require matching muntin profiles, adding $400 to $1,000 per window.
Palladian Windows: A large central arched window flanked by two narrow sidelights. Full assemblies run $2,500 to $6,000 installed. These are technically three separate units but sold and installed as one system.
Fixed (non-operable) versions of any style cost 15% to 25% less than operable casement or awning-style arched windows. If ventilation isn’t needed, stick with fixed units to save.
Factors That Affect Arched Window Replacement Costs
Window Size and Customization
Size is the single biggest cost driver. A 3-foot-wide arched window might cost $1,200 installed, while a 6-foot-wide unit in the same style jumps to $3,200 or more. Glass area increases exponentially with radius, and larger arches require heavier-duty framing and structural headers.
Customization adds cost in layers:
- Low-E or insulated glass: Add $150 to $400 per window. Essential for energy efficiency in climate-controlled homes.
- Tempered or laminated glass: Required for specific code applications (near doors, bathrooms). Add $100 to $300.
- Divided lites (muntins): Simulated grilles cost $75 to $150: true divided lites (TDL) add $300 to $800 for authentic historic appearance.
- Custom colors or finishes: Factory-applied exterior colors on vinyl or aluminum frames add $100 to $250 per window.
If your opening isn’t a standard arch radius, expect a full custom order with costs 20% to 40% higher than catalog sizes. Historic homes often require exact replication of original arches, which means hand-built frames and site verification by the manufacturer.
Frame Material Choices
Material selection impacts both upfront cost and long-term maintenance:
Vinyl: Most affordable, $600 to $1,800 per window installed. Low maintenance, good insulation, but limited color options. Not ideal for historic or high-end applications.
Aluminum or Clad-Aluminum: Mid-range, $900 to $2,200 installed. Durable, slim sightlines, and available in custom colors. Better for modern or commercial-style homes.
Wood: Premium choice, $1,500 to $4,000 installed. Authentic look, paintable, excellent insulation. Requires periodic refinishing unless clad with aluminum or vinyl exterior. Best for historic restorations or traditional architecture.
Fiberglass: High-performance option, $1,800 to $3,500 installed. Stable in extreme climates, low maintenance, and can mimic wood grain. Stronger than vinyl, more expensive than aluminum.
Composite: Engineered wood alternative, $1,200 to $2,800 installed. Resists rot and moisture better than solid wood, less expensive than fiberglass.
If you’re replacing windows in a home built before 1978, budget an additional $300 to $800 for lead-safe work practices, including containment and certified disposal. This is federally required when disturbing painted surfaces in older homes.
Labor Costs and Installation Complexity
Professional installation for arched windows runs $200 to $800 per window, depending on access, structural modifications, and regional labor rates. Straightforward replacement-in-kind (same size, same rough opening) sits at the lower end. New construction or enlarging openings can push labor to $1,000+ per window.
Installation complexity factors include:
- Height and access: Second-story or cathedral installations require scaffolding or lifts, adding $300 to $600 to labor.
- Structural headers: Arched openings over 4 feet wide often need engineered headers or additional framing. Budget $200 to $500 for carpentry if the existing header is undersized.
- Exterior trim and flashing: Custom trim work to match existing profiles adds $150 to $400 per window. Proper flashing is non-negotiable to prevent water intrusion.
- Interior finishing: Drywall repair, plastering around the arch, and trimming out specialty shapes can add $100 to $300 in finishing costs if not included in the installer’s quote.
Many installers charge a trip fee or minimum project cost for arched window work, often $500 to $1,000, because these aren’t quick one-hour jobs. Expect a full-day installation for a single arched window in an existing opening, longer if structural changes are involved.
Permits: Arched window replacements in the same opening (no structural change) often don’t require permits, but rules vary by jurisdiction. If you’re altering the rough opening, adding new headers, or working in a historic district, expect $50 to $200 in permit fees and mandatory inspections. Check with your local building department before demolition starts.
DIY vs. Professional Installation: Which Is Right for You?
Arched window installation is not a beginner DIY project. The risks, structural damage, water infiltration, voided warranties, and safety hazards, outweigh the labor savings for most homeowners.
That said, experienced DIYers with carpentry skills and proper tools can tackle a straightforward replacement (same size, no structural mods) and save $200 to $600 in labor. You’ll need:
- Level, square, and plumb bob for precise positioning
- Shims, spray foam insulation, and exterior-grade caulk
- Flashing tape or peel-and-stick membrane (critical for weatherproofing)
- Circular saw, reciprocating saw, and possibly a miter saw for trim work
- Safety gear: goggles, gloves, and dust mask (respirator if working in pre-1978 homes)
Most arched window manufacturers require professional installation to honor warranties. DIY installs may void coverage for leaks, seal failures, or glass breakage. If you go DIY, document every step with photos and keep all product literature, some manufacturers allow self-install if you follow their installation manual to the letter.
When to hire a pro:
- Second-story or taller installations (fall hazards)
- Structural modifications (headers, rough opening changes)
- Historic homes requiring matched details or period-correct methods
- Energy-efficiency rebates or financing that require licensed contractor work
- Any project where you’re unsure about load-bearing walls or building codes
Get at least three quotes from window contractors who specialize in custom or historical work. General handymen may lack the experience for proper arched window flashing and structural integration. Verify licensing, insurance, and ask for references on similar arched window projects.
Pros listed on contractor platforms and project cost resources can provide localized estimates and help you compare labor rates in your region. Expect lead times of 4 to 8 weeks between ordering custom arched windows and installation, plan your project timeline accordingly and avoid scheduling during peak season (spring and early summer) if you want competitive pricing.
