More Room, Same Home You Already Love

Home Additions In Egg Harbor Township & South Jersey

Running out of space? You love your house, but you need more room to live, maybe the family grew, someone moving in, whatever the case is our team of experts can build everything from a second story addition to bump-out addition.

From Cramped To Lively

Building Seamless Home Additions Since 2018

An addition isn’t really a remodel, it’s a small construction project attached to the house you already own. That means architectural plans, structural engineering, permits, zoning review, foundation work, framing, a new roofline tied cleanly into your existing roof, and full mechanical rough-ins for plumbing, electrical, and HVAC. A lot can go sideways if any of those steps get rushed or handed off to someone who doesn’t know what they’re doing.

We’ve built bump-outs, full rear additions, sunrooms, in-law suites, and second-story additions across Atlantic and Cape May County in areas like Linwood, Northfield, Egg Harbor Township, & more! Our in-house team handles design coordination, permit applications, and construction all under one roof (HIC #13VH11869600), and we work with trusted local architects and engineers when a project needs formal drawings.

Why Do You Need A Home Addition?

What Type Of Addition Is Right For You?

Most of our home addition projects fall into one of six different types, and each come with their own design questions, permits, price ranges and timelines.

A bump-out is a small extension of an existing room, usually two to six feet pushed out from the exterior wall to expand a kitchen, bathroom, or living room without building an entirely new room. Bump-outs are the smallest and fastest addition type, and they’re often the right answer when you just need a little more counter space, a breakfast nook, or room for a double vanity.

A full room addition is what most people picture when they think about an addition, a new bedroom, a new family room, a first-floor primary suite, a larger kitchen with a ground-up expansion. Single-room additions range anywhere from 150 to 600 square feet and typically require a new foundation, full framing, and a roofline integration.

Sunrooms give you more living space with the shore view you bought the house for. We build both three-season sunrooms (unconditioned, used when the weather cooperates) and four-season rooms (fully insulated and climate-controlled). Four-season rooms function as real year-round living space and add meaningful square footage to the home.

An in-law suite is one of the most-requested additions we build, especially for homeowners with aging parents moving in or adult children coming back home for a stretch. A proper in-law addition includes a private bedroom, bathroom, living area, and usually a small kitchenette, with its own entrance when the lot allows it. Done well, it gives everyone their own space while keeping the family under one roof.

When the lot doesn’t have room to expand outward, common on shore properties with tight setbacks — going up is often the only way to add significant square footage. Second-story additions are the most complex addition type because the existing structure has to be engineered to carry the new load, the roof comes off mid-project, and the house has to be protected from weather during framing. Not every home is a candidate, but when it works, a second-story addition can essentially double your house.

A wing addition adds an entire section to the home — often a primary suite wing, a family wing for the kids, or a combined great room / kitchen expansion. These are the largest scope we take on as standalone additions, and they often overlap with our whole-house renovations work when the existing floor plan is being reworked at the same time.

Portfolio

Some Homes We Have Expanded

Home Addition Projects

How Much Does A Home Addition Cost? 2026

Pricing Breakdowns For Home Additions In South Jersey

Additions price differently than remodels. Where a kitchen or bath comes in at a fixed scope, additions are priced largely by the square foot because you’re building new structure, not replacing finishes inside an existing room. Expect somewhere between $200 and $300 per finished square foot in our market for an addition built to a quality standard, with the tier depending on foundation type, finishes, and how complicated the tie-in to the existing house is.

Below is simply a guide to help you get a starting point for your project, the only way to find a real number is to schedule an estimate (with or without plans). For a more detailed price, see our home addition cost per square foot article here.

Small Additions & Bump-Outs

$40,000 – $120,000+. Two-to-six-foot bump-outs, small sunrooms (100 to 200 square feet), and modest room expansions. Simpler foundations, existing utilities can often be extended rather than rerun, and roof integration stays straightforward. Most bump-outs land in this tier.

Mid-Range Room Additions

$150,000–$350,000+. Full 300 to 600 square foot additions. New foundation, full framing, new roof section tied into the existing roofline, full mechanical rough-ins, and interior finish. Most of our single-room and four-season sunroom projects fall into this range.

Adding A Room Vs Moving

What Makes More Sense?

This is the real question behind every addition project. Before you call anyone about an addition, the question worth answering is whether it’s smarter to add on or to sell and buy something bigger. Here’s how we think about it when clients ask.

You Keep The House & Location You Love

The Cost Comparison Is Rarely What People Expect

You Control The Layout

Trusted With Over 50+ Home Additions In South Jersey

What Our Customers Think

      EXCELLENT  
   Based on 56 reviews 
    
 
 
 
   
 
 
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   Bridget Mclaughlin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Jayhawk Construction did a complete full remodel and addition on our home in Ventnor heights. There were many issues with our home after it was purchased. Justin and his team took the time to correct structural issues along with transforming our home. I highly recommend jayhawk construction for remodeling and additions.
  
 
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   Christina Potts 
 
 
 
 Trustindex verifies that the original source of the review is Google. Highly recommend Jayhawk Construction! Their team was consistently on time and finish the work exactly as scheduled communication with seamless and efficient making the entire experience completely hasslefree
  
 
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   Drew Richardsen 
 
 
 
 Trustindex verifies that the original source of the review is Google. A fine complete job from top to bottom. Jayhawk took care of all my needs in no time at all. Professional work.
  
 
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   Ravi Patel 
 
 
 
 Trustindex verifies that the original source of the review is Google. Been a few months since Justin and the crew finished the project but never got the time until now to write how amazing and easy they were to work with ! Finished our basement (except ceiling but that’s next project !) and Justin and the team was able to finish in less than 2 weeks ! Justin made process easy and the team was precise and thorough . Will definitely contact Jayhawk for future projects !
  
 
      Posted on Google  
   
   Samantha Santiago 
 
 
 
 Trustindex verifies that the original source of the review is Google. We cannot say enough positive things about Justin and his team! From the moment we shared our vision for the house, Justin truly listened and helped us imagine how to bring it to life. Throughout the entire process—from planning to the final day of construction—everything was handled with professionalism, care, and top-notch quality. Every question we had was answered promptly and thoroughly, and the end result is absolutely gorgeous. We are beyond happy with the outcome and so grateful for Justin and his team's hard work. Highly recommend!
  
 
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   Mark Sainsott 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent work at fair prices. Excellent to work with!
  
 
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   Mr.Trolly 99 
 
 
 
 Trustindex verifies that the original source of the review is Google. There is good and there is great!!! Justin and his crew are beyond amazing.  From start to finish they are professional, attentive, connected, considerate, and just top notch!!!! I would never do a project again if they aren’t involved
  
 
      Posted on Google  
   
   Barb Cawley 
 
 
 
 Trustindex verifies that the original source of the review is Google. Jayhawk showed up on time every day. They worked a full day, only a short lunch break. Very satisfied and happy with their work and they cleaned up after each shift. Would definitely recommend them.

Start To Finish Home Addition Process

How Your Project Comes Together

Additions take longer than most homeowners expect, and the biggest reason projects go sideways is that the front-end planning gets rushed. We slow that part down on purpose so the construction phase runs smoothly. Here’s how our addition projects move from first conversation to finished space.

Feasibility Estimates

Plans & Engineering

Permits & Zoning

Foundation & Site Prep

Framing & Roofing

Finish Work Starts

Inspections & Final Walkthrough

For most home additions, you can use this guide for timelines (these are specific to Atlantic & Cape May County):

Small bump-outs run 3 to 5 months including permits. Mid-size room additions run 6 to 10 months. Second-story additions and full wings run 8 to 14 months. We’ll give you a real schedule at the plans stage, not an optimistic estimate designed to get the job.