Addition or Move? How Western Mass Homeowners Should Run the Math

Almost every addition we build starts the same way. A family has outgrown the house, they spend a few months looking at listings, and then somebody says "what if we just added on?"

It is the right question. It is also one people answer badly, usually because they compare the addition's full price against the new house's down payment rather than its full cost. Here is how to run it properly.

The costs people forget when they move

The sticker price of the next house is not what moving costs you. Add:

• Broker commission on the sale of your current home.
• Closing costs on both sides.
• The rate difference. If you are sitting on a mortgage from a low-rate year, moving means giving that up. On a larger loan at a higher rate, this alone can outweigh the entire cost of an addition over the time you plan to stay.
• Moving expenses, which for a full household is not a small number.
• The new house's own project list. Very few people buy a house and change nothing. Budget for what you will immediately want to fix.
• Everything non-financial. School district, commute, neighbors, the yard your kids grew up in.

The costs people forget when they add on

Additions have their own hidden line items:

• Structural tie-in. Connecting new construction to an existing house means a new foundation that will not settle differently, a load path that works, and weatherproofing at the seam. This is where cheap additions fail.
• Systems capacity. Your existing furnace, electrical panel and hot water heater were sized for the current house. Adding 600 square feet and a bathroom often means upgrading at least one of them.
• Matching the existing house. Siding profile, roof pitch, window style and trim detail all need to match, or the finished result announces itself as an addition from the curb. Sometimes the matching material is discontinued and the right answer is re-siding the whole house.
• Living through it. We seal off work areas and clean up daily, but it is still construction in your home.
• Permitting time. Real, and worth building into the schedule up front.

When an addition clearly wins

• You like your location and would be sad to leave it.
• You have a favorable mortgage rate you would lose.
• The house is structurally sound and the lot has room within setbacks.
• What you are missing is specific and bounded: one bedroom, a bigger kitchen, a primary suite, a mudroom.
• You plan to stay long enough to enjoy it. Additions pay back in living, not in a quick flip.

When moving clearly wins

• The house has a problem an addition cannot fix, like a bad lot, a busy road, or a foundation issue.
• You need substantially more space than the lot can accommodate.
• You want a different town or school district.
• Your setbacks or septic capacity make expansion impractical.
• You are moving in the next couple of years anyway.

The types of additions we build most

Bump-outs. A few feet off the back of a kitchen or dining room. Smallest scope, disproportionate impact on how the room works.

Primary suites. A bedroom and bathroom addition, usually on the back or side. Consistently the addition people are happiest with.

Second stories. Highest cost and highest disruption, because the roof comes off. But if your lot has no room to spread out, up is the only direction available.

Sunrooms and porch enclosures. A relatively economical way to add usable season. One of our reviews is from a Westfield homeowner whose front porch we enclosed.

Wings and great rooms. Full room additions off the side, generally the cleanest way to add real square footage when the lot allows.

Get an actual number before you decide

You cannot make this comparison with an internet cost-per-square-foot average. Your foundation conditions, your setbacks, your electrical panel and the state of your existing siding all move the number.

We will come walk the house, look at what you are short on, and give you a real estimate for free. If we think you would be better off moving, we will tell you that too. We would rather lose the job than build you an addition that does not solve your problem.

Call (413) 454-8286 to set up a free consultation.