The cost to replace all windows in a house

By Anthony Moorman

Former Renewal by Andersen rep · 12+ years in residential real estate · Updated May 28, 2026

If you're budgeting a whole-home window project, the number that matters isn't "cost per window" in isolation. It's that number multiplied across every opening, plus a few line items that only show up when you do the whole house at once. The homeowners who get burned on a whole-home job anchor on one attractive per-window figure and never multiply it out. This page lays the math out so you can build a real budget before anyone quotes you.

The cost to replace all windows in a house is mostly simple multiplication

At its core, the cost to replace all windows in a house is window count × per-window installed price, adjusted for install type and a few whole-home factors. There's no magic in the total. It's the per-opening number repeated, which is exactly why getting that number right matters.

The per-window price itself is a stack: the window unit, the glass package, the labor, the install type, the brand markup, and (with most in-home sellers) the cost of the rep sent to close the sale. We break that stack apart on the window replacement cost guide. For a whole-home budget, the key insight is that whichever tier you land in gets repeated 15, 20, or 30 times, so a $200 swing per window becomes thousands across the house.

We don't print a fake "from $X" whole-home headline here, because that's the marked-up-list-price game this site exists to call out. The honest move is to fix your window count, pick a realistic tier, and multiply.

How many windows does a typical DC/MD/VA house have?

Most homes in our region fall between 15 and 30 window openings, and the count drives the total more than any single spec choice. A narrow DC row house sits at the low end; a Maryland or Virginia single-family colonial sits at the high end.

Window count varies by home type, not just square footage. A few regional patterns:

• DC row houses tend to be narrow and deep, with windows on the front and rear facades and none on party walls, often a lower count than the square footage suggests.
• MD/VA single-family colonials spread windows across all four elevations, often in the 20s or low 30s once you include basement and dormer openings.
• Cape Cods and split-levels land in the middle, with dormer windows that are awkward and pricier to access.

Count every opening, including basement and stairwell. The total is (count) × (tier price), so an accurate count is the foundation of an accurate budget. [data pending: OneStep verified average window count by home type, DC/MD/VA]

What's the cost to replace all windows in a house by size and count?

The whole-home total is the per-window tier price repeated across your count, so it climbs in steps as both count and tier rise. The table below frames the math structurally; the dollar ranges are tracked as data to fill, never invented.

These are whole-home totals, not per-window figures. Two things shift them beyond simple multiplication: oversized or special-shape openings cost more than a standard double-hung, and any opening needing full-frame rather than insert carries extra labor and materials. See the per-window ranges on the window replacement cost guide to build the total from the bottom up.

Does doing the whole house at once save money?

Usually, yes. The per-window cost typically drops a little when you replace everything at once, because the crew mobilizes, measures, and sets up once instead of returning for separate jobs. The total dollar amount is larger, but the cost per opening is often lower than phasing over several years.

The savings come from fixed costs spread across more units: one mobilization, one measurement pass, one permit where required, one disposal run. Phasing also carries match risk. If you replace half the house now and half in three years, the second batch may not match the first in color, glass tint, or product line if the manufacturer has changed it. On a front facade especially, mismatched windows are visible.

That said, phasing is the right call if the alternative is debt or skipping the project. Replacing the worst openings first (drafty, fogged, or stuck ones) and finishing later is a legitimate strategy; just go in knowing the tradeoffs.

Should I budget for insert or full-frame replacement?

For most whole-home projects on sound frames, budget for insert (pocket) replacement, the lower-cost path. Budget for full-frame only where the frame is rotted, where you're changing window type, or where the frame was never sound, and expect those openings to cost meaningfully more.

An insert replacement reuses the sound existing frame and fits a new window into the pocket. A full-frame replacement strips back to the rough opening, adding labor, materials, and trim work per opening. On a whole-home quote, watch for a blanket full-frame charge applied to every opening; on sound frames, that's worth questioning. A fair quote identifies which openings genuinely need full-frame and prices the rest as inserts.

When you budget, assume a mix: most openings as inserts, a handful as full-frame if the home is older or has known water damage. [data pending: typical share of openings needing full-frame in pre-1960 DC/MD/VA homes]

Which energy specs matter for a whole-home project in Zone 4?

DC, Maryland, and Virginia sit in IECC climate zone 4 (mixed-humid), so across the whole house you're paying to keep heat in during winter and out in humid summers. The two NFRC-printed numbers to compare are U-factor (lower means less winter heat loss) and SHGC, the solar heat gain coefficient (lower means less summer solar gain).

On a whole-home project, you don't have to pick one glass package for every opening. South- and west-facing windows benefit from a lower SHGC to block summer heat; north- and east-facing windows can run a higher SHGC to gain a little winter sun. Tuning glass by elevation beats paying for the most expensive package on every window. For the exact certified U-factor and SHGC to target for your address, use [data pending: ENERGY STAR v7.0 certified U-factor and SHGC for the buyer's specific DC/MD/VA ENERGY STAR window zone] or ask Zig to pull the target for your location.

What does it cost to replace all windows in a house with OneStep?

OneStep is built to show you an itemized, no-rep whole-home price for your specific openings before anyone talks to you. The total depends on the same drivers above (count, tier, glass, and how many openings need full-frame) applied to your actual house, not a generic average.

Because pricing is configured per home rather than pitched, the cleanest way to see a real number is to run your address through the configurator. You measure with your phone, configure each opening in 3D, and see an itemized total, every window as its own line, not one bundled lump sum with an expiring discount.

Frequently asked questions

Next step

The most useful thing you can do before talking to any installer is see a real, itemized whole-home number for your own openings. Our 3D configurator pulls up your home, lets you place every window you need, and prices each opening, with no rep, no pitch, and no expiring discount.

For the per-window tier breakdown that builds this total, start with the window replacement cost guide and the cost hub. For the bigger picture, see window replacement and the styles at the windows hub, including double-hung and casement, the two most common in DC/MD/VA homes, and picture for fixed openings. The person behind every page is at Anthony Moorman.