Window Installation Cost Calculator

Professional window installation averages $450 to $1,500 per window installed, including the unit and labor. Standard vinyl double-hung windows land in the $400 to $700 range, while premium materials (fiberglass, wood) and specialty shapes (bay, bow, arched) can reach $1,500 to $3,500+ per opening. A typical whole-home project of 10 to 12 windows runs $6,000 to $15,000 depending on material, type, and install method. New-construction installs cost less per window than full-frame replacements because there's no tear-out or re-flashing involved.

They overlap, but there's a useful distinction. 'Installation' broadly covers putting in windows — including new-construction installs where windows go into open framing (during a build or addition) and first-time installs. 'Replacement' specifically means removing an existing window and installing a new one in the same opening, and it splits further into insert (retrofit) replacements, where the new window fits inside the existing frame, and full-frame replacements, where everything comes out down to the rough opening. New-construction is generally the cheapest because the wall is open and there's no demolition; full-frame is the priciest because of the tear-out, re-flashing, and re-trimming.

Each has trade-offs. Vinyl is the most affordable, low-maintenance, and energy-efficient — the popular value choice. Fiberglass is stronger and more dimensionally stable, handles temperature extremes well, and can be painted, but costs more. Wood offers the best looks and insulation but needs regular maintenance and is the most expensive. Aluminum is strong and slim-profiled but conducts heat (a poor insulator unless thermally broken). Composite blends wood fibers and polymers for durability with low upkeep. For most homeowners vinyl is the best value; fiberglass or composite justify the premium for longevity; wood suits historic or high-end homes where appearance rules.

It depends on your situation. New-construction windows have a nailing fin that attaches to the framing — the right choice when the wall is open (a new build, an addition, or when siding is coming off anyway). Insert/retrofit windows have no fin and slide into the existing frame, ideal for replacing windows without disturbing the surrounding wall, siding, or interior trim — faster and cheaper, though you lose a little glass area. Full-frame replacement removes everything to the rough opening and is best when the existing frame is rotted or damaged, or when you want to change the window size. The calculator prices all three so you can compare the labor difference.

A standard install covers removing the old window (on a replacement), prepping and squaring the opening, setting and leveling the new unit, securing it (nailing fin for new construction, or screws and shims for inserts), insulating the gaps with low-expansion foam, installing or replacing flashing and the weather-resistant barrier, sealing with exterior caulk, and installing interior and exterior trim. Full-frame installs add work to rebuild the rough opening and re-flash, which is why they cost more. Always confirm whether haul-away of old windows and trim/finish work are included in the quote — those are common places a low bid leaves gaps.

The two highest-value upgrades are Low-E coatings and gas fills. Low-E (low-emissivity) coatings are microscopically thin metallic layers that reflect heat — cooler in summer, warmer in winter — usually a $40 to $80 per window upgrade with strong ROI. Argon or krypton gas between the panes insulates better than plain air for a modest cost. Triple-pane glass adds a third pane for maximum insulation and sound reduction (about $100 to $200 per window) and is worth it in extreme climates or noisy areas. Look for the ENERGY STAR label and check the U-factor (lower is better) and SHGC for your climate zone.

It depends on scope and jurisdiction. Like-for-like replacements (same size, same opening) often don't need a permit, but many municipalities require one for full-frame replacements, size changes, or egress installations; new-construction installs are covered under the project's building permit. An egress window is one large enough to serve as an emergency exit and firefighter entry, required by code in every bedroom and in finished basements used as living space — typical minimums are a 5.7 sq ft net clear opening (5.0 at ground floor), 24-inch minimum height, 20-inch minimum width, and a sill no higher than 44 inches. If you're doing bedroom or basement windows, make sure they meet egress, which can drive the size and cost.

A skilled two-person crew installs roughly 8 to 15 standard windows a day, so a whole-home project of 10 to 12 windows is usually 1 to 2 days; each standard window takes about 30 to 60 minutes, while full-frame, bay/bow, and specialty units take 2 to 4 hours each. For an accurate quote, give an exact window count and the type of each, specify the frame material and glass package, say whether you want new-construction, insert, or full-frame, and flag site factors like multi-story access or existing rot. Get at least three itemized quotes that break out unit cost, labor, disposal, and trim separately — an in-home measurement is essential for a firm price.