Quick answer
Mobile home windows are smaller than standard site-built windows and use distinct sizes — typically single-hung 30″x60″ for living rooms and bedrooms, horizontal sliders 36″x36″ for bathrooms, and fixed 24″x36″ for kitchen and laundry. All HUD-code mobile/manufactured homes ship with energy-rated dual-pane windows as the 2026 federal standard. Replacement window cost ranges $175–$650 per window ($300 typical) including labor. Upgrade options: triple-pane low-E ($150 upgrade), impact-rated coastal ($200–$450 upgrade), full-frame replacement vs insert ($75–$200 difference).
Standard mobile home window sizes
Manufactured housing uses a smaller window grid than site-built construction because the home is engineered around HUD-code structural framing on a chassis. Common 2026 sizes:
- Living room / great room: 30″x60″ single-hung (most common) or 36″x60″ dual-pane
- Bedroom: 30″x40″ or 30″x60″ single-hung. Egress requirements (per HUD 3280) cap the minimum sill height and minimum clear opening.
- Bathroom: 24″x24″ or 36″x36″ horizontal slider (often with privacy/obscure glass)
- Kitchen: 30″x36″ slider above the sink, or fixed picture window
- Laundry / mud room: 24″x24″ fixed or slider
- Picture / accent: 48″x60″ fixed (great room focal walls); also half-circle and arched accents on some park-model and modular variants
If you’re replacing existing windows, measure the rough opening (the framing hole) and the unit dimensions separately. Mobile-home retrofits typically use insert windows that match the existing rough opening exactly — saves labor.
Window types compared
| Type | Cost (replacement) | Energy | Best for |
|---|---|---|---|
| Single-hung | $175–$275 | Standard dual-pane | Living rooms, bedrooms |
| Double-hung | $225–$375 | Better airflow | Bedrooms with humidity concerns |
| Horizontal slider | $200–$325 | Easy operation | Bathrooms, kitchens, narrow walls |
| Casement | $275–$475 | Best seal | Cold climates, high winds |
| Awning | $250–$400 | Rain-tolerant | Bathrooms, kitchens, basements |
| Fixed picture | $225–$425 | Best insulation | Great-room focal walls |
| Impact-rated (coastal) | $450–$650 | Hurricane-zone certified | FL, TX coast, NC/SC coast, LA |
All Tiny Homes USA new builds ship with energy-rated dual-pane vinyl windows as standard. Upgrade to triple-pane low-E ($150 per window) for cold-climate placements, or impact-rated ($200–$450 per window upgrade) for coastal hurricane zones.
DIY vs professional replacement
Replacing a single mobile home window is one of the easier DIY home projects — if you can measure accurately and use a caulk gun, you can do it. The flip side: a single mistake can compromise the wall’s weather seal and lead to rot.
DIY (~$175–$300 per window in materials, 2–3 hours per window):
- Measure the existing rough opening (the framing hole, not the visible window glass)
- Order an exact-match insert window from a mobile-home supplier (Window World, Mobile Home Depot, local manufactured-housing dealer)
- Remove interior trim and exterior J-channel
- Cut sealant, remove old window from rough opening
- Insert new window, level, and shim if needed
- Reseal with butyl rubber tape and exterior-grade caulk
- Reinstall trim and J-channel
Professional install (~$300–$650 per window, 1–2 hours per window): Local manufactured-housing dealers and window contractors typically charge $125–$275 per window in labor on top of the window cost. Often worth it for multi-window jobs where they bulk-discount labor — or for upper-floor windows on 2-story modular.
When to replace mobile home windows
Replace your windows when you notice any of these:
- Visible condensation between panes — the dual-pane seal has failed; window is no longer insulating
- Drafts or air leaks — gasket or sash seal has failed
- Water staining on the sill or wall below — flashing or caulk seal has failed; replace before rot spreads
- Sticky or hard-to-operate windows — sash mechanism or balance is failing
- You’re upgrading for energy efficiency — pre-2010 mobile home windows are typically R-2 to R-3; 2026 dual-pane low-E hits R-4 to R-5; triple-pane low-E hits R-5 to R-7
- You’re moving into a hurricane or tornado zone — standard windows aren’t impact-rated; required by code for coastal placement
Related from Tiny Homes USA
Building a new home? Window package included.
Every Tiny Homes USA new build ships with energy-rated dual-pane vinyl windows as standard. Triple-pane low-E and impact-rated upgrades available during the build window. Send us your placement zip code and we’ll quote the right window package for your climate.
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