Sample design by Cheap Cheap Websites.com · Get yours from $399 →

See your addition before we build it.

Rear additions, second stories and sunrooms, designed around a scale model you can hold, turn and change.

Plan my addition →
Scale model of a home addition with miniature treesScale model, 1:50Rear addition · two roomsRoofline matched to the house

Why we model first

Most additions go wrong on paper, long before anyone swings a hammer. A roofline that fights the house. A hallway that eats the room. So we build yours twice: first in foam on our table, where every change is free, then on your lot, where it counts.

Foam is cheap.Moving a wall on the model takes a knife and a minute. Moving it on site takes a change order.
You see it in 3D.Most people can't read a floor plan. Everyone can read a model.
Nothing is hidden.Rooflines, window heights and the walk from the old house to the new room are all on the table.

What we add

Four ways to get
more house.

Every addition is designed to look like it was always there: same eave lines, matched siding and trim, and floors that meet without a step.

01

Rear additions

A bigger kitchen, a family room, a primary suite that finally faces the yard.

→
02

Second stories

Go up instead of out and keep the yard you have. We study the load path first.

→
03

Sunrooms & four-season rooms

Glass, light and a room you will use in January, not just July.

→
04

Screened porches

An outdoor room under a real roof, tied into the house so it looks original.

→
Bright sunroom addition with a glass ceiling and white sofa

Featured build

A glass room off the kitchen, modeled in an afternoon.

Four-season roomAddition type
Vaulted glass roofSignature detail
Siding & trim matchedExterior tie-in
Two model studiesBefore framing

From foam to framing

Four steps, one
project lead.

Detailed architectural model
Step 01

Walk & measure

We walk the house and lot with you, measure everything and talk through how you actually live.

Sectioned model on a dark table
Step 02

Build the model

A scale model of your house and the addition. We change it with you until it feels right.

Framed addition interior with open ceiling joists
Step 03

Permits & framing

Drawings go to your local permit office. Once approved, the model becomes a frame on your lot.

Finished screened porch addition
Step 04

Finish & hand over

Trim, paint and a final walkthrough. The model is yours to keep.

Our standards

How every Foundry
job is run.

An addition means living next to a jobsite for a while. These are the rules we hold ourselves to while we're there.

Carpenter cutting trim with a miter saw in a bright room

Where we build

Close-in neighborhoods to the edge of town.

We take on additions across the city and the surrounding suburbs, from tight urban lots to wide rural parcels. Tight lot lines and older homes are where modeling first helps most.

Older city neighborhoodsInner-ring suburbsNewer subdivisionsLake & river townsRural lotsHistoric districts

Questions

Before you call.

Do I need an architect before talking to you?

No. We start from your house and your wish list. If your project needs stamped drawings, we coordinate that as part of the design phase.

What does the model actually show?

Your existing house and the proposed addition at scale: rooflines, windows, doors, decks and how the new space meets the old. Interior layouts lift off so you can see the rooms.

Can we live at home during construction?

Usually, yes. We seal the opening into the existing house until the new space is closed in, and keep the work area separate from your daily routes.

Will the addition match my house?

That's the whole point. We match eave heights, roof pitch, siding and trim profiles so the addition reads as part of the original home.

Do you handle permits?

Yes. We prepare the drawings, submit them to your local building office and schedule the inspections.

Start with a model

Bring your house. We'll bring the foam.

Plan my addition →

Additions that look like they were always there.

AdditionsRear additionsSecond storiesSunroomsScreened porches
StudioProcessStandardsQuestions
StartPlan my additionBook a site walk

Style C067 · Model on the Table

Get this style for my business

Love this look? We build it for your business, written and launched for you, starting at $399.

Get this style for my business →
✦ Get this style