Key Points

The blend is decided in design, not on the job site, so we study your existing roofline, siding, windows, and floors before anything gets drawn.
Matching materials only works if the addition is also sized in proportion to the house.
The interior transition from the old space to the new addition needs to match as well.

Add On Without Giving It Away

Adding on, but scared it’ll look tacked on, like the new siding won’t match the old or the floors won’t line up where they meet?

Those are the right things to worry about if you hire a contractor you don’t trust.

In this post, you’ll learn how a home addition gets designed to blend into your house on the Front Range, from the roofline down to the floors.


How Do You Design a Home Addition That Blends With Your Existing House?

Designing a home addition that blends with your existing house starts in design, not construction.

You study the existing home closely, match or complement its materials on the new space, keep the addition in proportion, and plan the spots where old meets new.

With Bunn & Sons Custom Builders, the whole design gets locked before the build begins, so you can feel confident your home will look like it was built at the same time.

What can it cost to build a blended home addition?


Start With the House You Already Have

Before we draw a single line, we study the house that’s already there. We look at:

  • The roofline and its pitch, the window proportions, the siding, and the trim.
  • How the floors run from the old rooms into where the new one will go.
  • The style of your home, because an older ranch and a newer two-story have different needs.

Get that read right, and the addition has something true to match.

Get it wrong, and no finish saves it.

You’ve seen it on other houses: new siding a shade too bright against the faded original, or a roofline that just doesn’t line up.

Little misses, but your eye catches them.

The test we hold ourselves to is simple: if a visitor can tell where the original house ends and the addition begins, we didn’t do our job.


Match the Outside: Roof, Siding, and Windows

The outside is where a mismatch shows first.

It’s the part every neighbor and everyone who pulls into your driveway sees, so it’s the part we sweat the most.

Rooflines and Overhangs

A roof that’s off by a few degrees throws the whole house off.

So we match the pitch and tie the new roof into the existing one.

On the framing, we set the truss heel heights and overhangs so your new eaves land at the same depth as the ones already on the house.

Siding, Brick, Windows, and Doors

New siding won’t match old siding right off the shelf.

Sun and weather have already changed the color of what’s on your house, so we match it as closely as the house allows.

We match the window proportions and the finish so they read as part of the original wall.

A new front or patio door has to belong to the same house, too, so we ensure the colors and proportions match as well.


Keep It in Proportion

Matching materials only gets you halfway.

Scale is the other half.

An addition that’s the wrong size reads as wrong even when every finish is perfect.

That’s why scale gets worked out in the design phase, sized against the whole house instead of drawn on its own.


Where Old Meets New Inside

The blend can’t stop at the front door.

Walk from an old room into the new one, and the floor is the first thing that tells on a bad job.

That’s why the transition from old flooring to new is one of the things we plan before we draw.

Sometimes the connection means opening a wall between the old house and the new room, so the two actually live as one space instead of a house with a bonus room hanging off the back.


Get a Home Addition That Blends with Bunn & Sons Custom Builders

We work the blend out in design before we ever build it, settling your roofline, materials, and transitions during our pre-construction planning phase.

That’s how your finished addition ends up looking like it belonged to your home from the start.

Fill out our contact form today or give us a call.

The first conversation is free, and it isn’t a sales pitch, just how we figure out whether we’re the right fit before anyone talks design.

Frequently Asked Questions

How much value does a home addition add to your house?

We can't put a percentage on how much value a home addition adds, because we build homes, we don't appraise them. A local real estate agent who knows your neighborhood is the right person for a resale number. What we can tell you is that adding on lets you keep the location, the schools, and the neighbors you already chose, instead of paying to move for space.

How long does a home addition take from start to finish?

A single-room addition runs about 3 to 4 months of build time, and larger work with a kitchen, a second story, or major foundation changes runs 6 to 9 months or more. Before that, there's the planning phase where we settle the full design. You get a firm schedule as part of that planning.

Is it cheaper to add on or buy a bigger house?

Adding on is often the better move in this market, but only when the addition is built right and actually solves the problem that had you looking. Moving here is expensive and frequently a lateral trade, and doing an addition wrong means paying to do it twice. Several of the additions we've built were tear-offs of someone else's failed sunroom or patio enclosure.

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