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Princeton · NJ · Bucks County · PA

Home Additions

Princeton & Bucks County

Design-build additions with one point of contact, a written scope and signed change orders.

What an addition costs
  • Design-Build Remodeling
  • A Crew We Manage
  • General liability insurance (biBERK)
  • 1-Year Written Warranty
  • Written Change Orders
  • NJ HIC #13VH13547600
  • PA HIC #PA199109

Our commitment

More room for your house,one point of contact,every change in writing.

The Home X designs and builds additions in Princeton, NJ and Bucks County, PA. A crew we manage does the work; plumbing, electrical and HVAC work goes to subcontractors in those trades, and other specialty trades when a job needs them. On your job, any permit the work needs is in place before that work starts.

Scope of Work

What we deliver

Your written scope lists what we do and don’t do, the materials, allowances, schedule and price.

Investment

In your written scope

Schedule

Set in your written scope

What an addition costs
  1. 01

    Drawings and Permits

    An addition needs drawings and permits. On your job, any permit the work needs is in place before that work starts, and what your addition needs is written into the scope.

  2. 02

    Foundation and Framing

    The foundation, the framing and the roof tie-in, listed in the scope with the materials and the schedule.

  3. 03

    Plumbing, Electrical and HVAC

    Done by plumbers, electricians and HVAC techs, subcontractors we manage.

  4. 04

    Inside

    Insulation, drywall, flooring, trim and paint, with the materials and allowances listed before you sign.

  5. 05

    Outside

    Siding, roofing, windows and doors. What we match and what’s new is spelled out in the scope.

  6. 06

    Changes

    If something changes, or we find a problem once things are open, you get a written change order with the price before that work starts.

Our work

Additions, by town

AdditionRobbinsville, NJ

$195,039.40

Second-floor buildout with new dormers

What that price covers: The structural shell and weather-tight dry-in: architect and permits, foundation work, framing, dormers, roof and gutters, windows and sliders, plus an optional deck package. Interior finishes are a separate phase.

Signed contract price · Underway

Why The Home X

One point of contact.
Scope and changes in writing.

01

Written scope after our visit

After our visit you get it in writing: what we do and don’t do, the materials, allowances, schedule and price. If it isn’t in the scope, it isn’t in the job.

02

A crew we manage

A crew we manage does the work; plumbing, electrical and HVAC work goes to subcontractors in those trades, and other specialty trades when a job needs them. You have one point of contact.

03

Written change orders

If you change something, or we open a wall and find a problem, you get a written change order with the price. That work starts only after you sign it.

04

General liability insurance

General liability insurance with Berkshire Hathaway Direct Insurance Company (biBERK). Certificate available on request. We’re a registered home improvement contractor in New Jersey, NJ HIC #13VH13547600, and Pennsylvania, PA HIC #PA199109.

How it runs

From first call to
final walk-through.

01

Discovery call

First

Call (609) 874-0990 or send the form. We talk about the room, your timeline and your budget, then come to the house, measure, and look at what it's hiding: framing, plumbing, the electrical panel.

02

Scope and design

After the visit

After the visit you get a written scope: what we do and don’t do, the materials, allowances, schedule and price. Anything you haven’t picked yet is carried as an allowance. You owe nothing until you sign.

03

Construction

On site

A crew we manage does the work; plumbing, electrical and HVAC work goes to subcontractors in those trades, and other specialty trades when a job needs them. Any permit the work needs is in place before that work starts, and any change is a written change order you sign first.

04

Final walk-through

At the end

We walk every room we touched with you, write the punch list down and work through it. Your 1-year workmanship warranty is in your contract, and manufacturer warranties pass through to you.

Service Area

Home Additions in Princeton, NJ and Bucks County, PA

Princeton and nearby towns, including Mercer, Middlesex, Somerset and Hunterdon counties, NJ, and Bucks County, PA. See every town we cover, with its permit rules.

The Home X works in Princeton, NJ and Bucks County, PA. Not sure we cover your town? Call (609) 874-0990.

Common Questions

Questions about
home additions.

What people ask us before they sign.

An addition in Robbinsville, NJ (second-floor buildout with new dormers) was signed at $195,039.40, and that price covers the structural shell and weather-tight dry-in: architect and permits, foundation work, framing, dormers, roof and gutters, windows and sliders, plus an optional deck package. Interior finishes are a separate phase. For a wider view, Cost vs. Value 2025, Middle Atlantic region puts a midrange bathroom addition at $69,715 and an upscale one at $125,217, and a primary suite addition at $195,129 midrange and $401,886 upscale. Your number comes in a written scope after our visit, and you owe nothing until you sign.

It depends on the size, the permits and the lead times on materials. Your written scope includes the schedule before you sign.

Yes. We pull the permits the work needs, and the fee is in your scope. Any permit is in place before that work starts.

A crew we manage does the work; plumbing, electrical and HVAC work goes to subcontractors in those trades, and other specialty trades when a job needs them. You still deal with one company and one point of contact the whole way through.

You get a written change order with the price, and the extra work starts only after you sign it. That goes for changes you ask for and for problems we find once the walls or floors are open.

A 1-year workmanship warranty on our installation, written into your contract. Manufacturer warranties on the products themselves pass through to you.