Dormer Addition Cost Reddit

Anyone know how much a dormer or addition to a house costs? I want to add 100-150 sqft to our tiny upstairs and not sure how much it costs. I'm seeing about $100-150/sqft online but a contractor (over the phone) gave me a ballpark of $600-800/sqft, which sounds fucking ridiculous. Not sure what to expect.

Has anyone recently finished their attic or added a dormer? I'm at the very early stages of exploring the idea of finishing our attic, and am wondering how much it would cost (Boston prices). We'd need to add a shed-style dormer (roughly 20-ft long x 11 ft deep). The whole attic is around 920 sq ft.

The biggest cost drivers are the extent of roof reconstruction required and the finish level inside the dormer. A simple shed dormer added to a modest home might cost $10,000-$15,000. But if you're cutting into a steep-pitched roof or building multiple dormers with added insulation, drywall, and electrical, costs can easily double or triple.

The cost to add a dormer to your home is high, but it might be worth it for the added space, light, and style. Let's break down the pros, cons, and prices. The cost to add a dormer to a roof or attic is $90 to $150 per square foot or $3,000 to $25,000 on average.

The overall dormer addition cost can range from $2,500 on the low end to as high as $80,000, with most homeowners spending an average of $15,000. Factors like construction complexity and material quality significantly impact the final pricing of your dormer addition. Adding dormers boosts curb appeal, increases natural light, and expands living space.

You'll also need to budget for permits. A dormer addition answers that question without the upheaval-or price tag-of a full second story. By pushing the roofline outward, you gain headroom, daylight, and usable square footage while keeping your foundation (and budget) intact.

Dormer estimate: $255k Got an estimate today to put up a separate apartment on the house. Simple, 2-3 bedrooms, one bathroom, kitchen and living room. Any experience?

A dormer addition typically costs between $10,000 and $40,000 for one or two units on a standard roof, with per-dormer variations from roughly $6,000 to $25,000 depending on size and finish. The widest gaps come from roof steepness, existing attic constraints, and the selected dormer style (shed, gable, or bay). I'm planning some rennovations and I'm interested to learn the ballpark price for what this type of addition would cost.

Is it like, $25k or is it like $100k? Specifically, it's a cape cod style house and the addition is adding a small mudroom (maybe 5x5?) and converting the left dormer window into a high arch, plus adding the window back.