Cape Cod dormers · Union County, NJ
Two more bedrooms without leaving your yard
Shed dormers, gable dormers, and attic conversions that turn a cramped Cape half-story into real bedrooms and a full bath, designed, permitted, and built by DMF Construction.
- Zoning, engineering, and permits handled
- Roof open only a few days, not weeks
- Stay in your home through most of the build
Services
Ways to add space upstairs
Shed Dormers
A full-width rear dormer that turns a cramped Cape half-story into two real bedrooms and a bath.
Learn more →Gable Dormers
Individual doghouse dormers that add light, headroom, and curb appeal.
Learn more →Cape Cod Second Floors
When a dormer isn't enough: raise the roof for a full second story.
Learn more →Attic Conversions
Turn an unfinished attic into a bedroom, office, or playroom, with or without dormers.
Learn more →Primary Suites Upstairs
A dormer built around a primary bedroom, walk-in closet, and bathroom.
Learn more →Why a dormer
Union County is full of Capes that outgrew their families
Towns like Clark, Cranford, Union, Kenilworth, and Scotch Plains were built out with Cape Cods after World War II. They're solid houses in great locations, but the upstairs is two small rooms under the eaves and no bathroom.
A rear shed dormer changes that. You get full-height bedrooms and a bathroom upstairs, inside the footprint you already own, for a fraction of the cost of moving.
Typical 2026 ranges
Gable dormer: $15K–$30K each
Shed dormer shell: $45K–$80K
Finished shed dormer + bath: $95K–$160K
Open the calculator →How it works
From first visit to final walkthrough
- Site visitWe measure upstairs, check framing, stairs, and zoning.
- Concept & priceA sketch of what's possible and a written price range.
- Design & permitsArchitect, engineer, zoning check, and building permit.
- BuildRoof off and dried in within days; finished in 10–16 weeks.
- FinalInspections, certificate of approval, walkthrough.
Free estimate
Find out what your Cape can become
We measure the upstairs, look at the roof framing and stairs, check your zoning, and sketch what a dormer could give you. Then we send a written scope and price range, before you spend anything on drawings.
“The projects went pretty smooth, they are very honest and fair, punctual which most important now a days.”
“The pricing was fair and competitive compared to other quotes that I have gotten. They gave me a step by step outline.”
“David has been 100% accessible, EVERY time I needed, by phone, email and most impressively, in person.”
Service area
Dormers and attic conversions across Union County and nearby
Tap your town for local pricing, permit notes, and projects near you.
FAQ