Out, Up, Or Neither
Your family outgrew the house, and now you’re staring at the ceiling, wondering whether the answer is out, up, or somewhere you haven’t thought of.
Which is even possible here?
In this post, you’ll learn what an addition runs and how long it takes, the three ways to get space, what pushes the budget past the shell, and why we only build drawings we drew.
How Much Does A Home Addition Cost And How Long Does It Take?
A home addition with us runs north of $200,000 and takes 4 to 6 months, though some take longer than a year.
A basic addition starts at $400 per square foot, and that number buys the shell.
Finished additions land between $400 and $600 per square foot or higher, depending on the foundation and the finish level.
A four-season room starts around $175,000.
Here at WISA Solutions, our additions last year averaged $188,825, ranging from $120,000 to $260,000.
That’s a range, not a quote.
Bump Out, Build Up, Or Rework What You Own
There are three ways to get more usable space on a Northern Virginia lot, and only two of them involve adding new square footage.
Out, up, or inward.
Bumping Out The Footprint
Bumping out means extending the existing footprint horizontally, and it’s the addition we build most.
The requests that come to us are enlarging a kitchen, adding a bedroom and bathroom, or building a main floor suite so a parent can move in, which usually brings aging-in-place upgrades with it.
Sunrooms too.
The ones we do have real framing and often a fireplace, which is why a four-season room starts at $175,000 rather than the price of a prefab shell bolted to your siding.
We’re looking at a Burke addition right now in the $250,000 range that came to us off a Facebook ad.
Height isn’t off the table just because you’re building out.
We’ve done a three-story addition by bumping out the footprint first and building all three floors inside that new footprint, which is a different structural problem than adding a floor on top of a house that wasn’t designed for one.
Building Up, And Why We Pass
If your plan is a second story on your existing house, we’re not your builder.
Pop tops carry too much liability for us, so they sit on the same do-not-offer list as handyman work and cabinet refacing.
You’ll hear that on the discovery call, not after you’ve spent three weeks on drawings.
Reworking Space You Already Have
Sometimes the space is already inside your walls, just chopped into rooms nobody uses.
On the Vienna main floor, we reworked roughly 1,200 square feet for $325,000 over about four to five months, and the homeowners gained a guest bedroom and a full bathroom without adding a single square foot outside.
The sunroom became the bedroom, which meant pulling the windows, reframing, adding an exterior door, upgrading the insulation, running new HVAC ductwork, and building a closet.
A sunroom is not a bedroom until it’s conditioned and it has a closet.
The half bath got relocated and expanded into a full bath with a double vanity and a walk-in shower.
Two load-bearing walls came out, which meant LVL beams overhead and new posts down in the basement, plus basement repairs to carry the load.
The load has to go somewhere.
A new mudroom went in off the garage with the entry door relocated, a storage drop zone, and a water line run for a second refrigerator.
The fireplace got a new surround, face, hearth, and built-in shelving, plus a gas line for later conversion.
They didn’t want a fully open plan, and we didn’t give them one.
What Drives The Budget Past The Shell
The shell price is framing.
Framing is not a finished room.
Past that, the addition needs conditioning, and that’s either a new HVAC system or a mini-split for the new space.
Expect a new electrical panel or a subpanel, because a house sized for its current load usually can’t absorb another room’s worth.
On that Vienna project, we installed a second HVAC system just to control the upstairs.
Then there’s the outside of the box: windows, siding or exterior brick and veneers, and exterior doors.
Flooring usually matches what you already have unless you’re redoing the floors throughout or want a contrast with tile or slate.
Foundation type is what moves you from $400 a square foot toward $600.
Some costs fall outside the project rather than inside it, and on the Vienna job, exterior siding replacement cost about $30,000, which was outside the renovation scope.
Our contract also carves out what nobody can see before demo, including re-routing ducts or conduits we find in a wall we open, hazardous materials, and changes an inspector requires after approval.
Each of those goes through a change order that you sign first.
What Design And Permitting Actually Involve
Design, permitting, and construction all sit with us, so you’re not hiring an architect, then an engineer, then a designer, then trades.
It starts with a discovery call and photos of your space before we schedule anything.
You send us inspiration first, Pinterest boards or saved images, so our designer walks in already knowing your taste.
Then, an in-home meeting where our architect, our designer, and our GC all walk the space once, together, so you’re not hosting four separate visits.
We draw an as-built, then bring you into our design center for 3D renderings on the big screen with the scope and the estimate reviewed line by line.
You get a full drawing set: scope of work, material list, demo plan, floor plan, mechanical and electrical plan, wall elevations, and rendered views.
Every sheet carries the same line stating that all dimensions are subject to site verification before work starts.
So we verify them.
We hold a Class A license in Virginia, along with residential and commercial builder’s licenses, and permitting goes into your scope of work, with the Fairfax County pre-construction meeting run by us.
Why We Only Build Our Own Drawings
Homeowners ask whether we’ll bid on a set of plans their architect already drew.
The answer is no.
We only build designs we produced, and that isn’t us being precious about authorship.
A fixed price depends on us having drawn the thing, priced the thing, and standing in your house to confirm the conditions behind the drywall before anyone signs.
Hand us somebody else’s plan set, and we’re pricing assumptions we didn’t make, on a structure we didn’t verify, which is exactly how a fixed number turns into an estimate that grows.
We do one full design and rework it until you like it.
If it starts looking like the drawings are getting shopped around, we charge a design fee at 5% or $2,500 and up.
Ready To Stop Guessing About Your Lot? Reach Out To WISA Solutions
The main takeaway is that adding square footage isn’t your only option, and the shell price isn’t the project price.
Whether you build out or rework what you already own, the number only holds if the same people who drew it are the ones building it.
Fill out our contact form or give us a call, and we’ll tell you which path your house can actually support.
