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What a remodel costs in Reno and Sparks
Where an addition starts beside a kitchen and a bathroom, why a whole home waits for a walkthrough, and why no single price is printed for any of them.
What a home addition costs in Reno and Sparks
An addition is priced by the square foot, and the range is wide on purpose, because a simply finished room and a high-end suite are not the same job. Here is where an addition starts in Reno and Sparks, why a second storey starts from the same range as a room built out, and what no square foot number includes.
- Published
- 6 October 2026
- Subject
- Home addition cost in Reno and Sparks
- Prices printed here
- None, starting ranges only
- Faster than reading
- (775) 200-0648, Monday to Friday, 9:00 AM to 4:00 PM
01The range
A Reno addition is priced by the square foot, and the finish moves it more than the floor it sits on.
For an addition of about 400 square feet, finished to match the rest of the house, the starting range runs from about seventy thousand to around a hundred and forty thousand. A simply finished room (sound, insulated, plainly trimmed) starts lower, in the mid fifties. Both assume a house built in 1990 or later; an older house carries an allowance for what its walls tend to hold. The same 400 square feet built up, as a second storey or a room over the garage, starts from the same range, because we price a second storey by the square foot the same as a room built out at ground level. Those ranges carry an allowance for the building permit fee itself; they are starting ranges, not quotes, and they come from our own Reno and Sparks pricing rather than published rates or a national average.
If you want a range for your own size and finish, the remodel cost calculator takes the square footage, the finish level and the age of the house, and returns a Reno and Sparks starting range in about two minutes. Where an addition sits beside a kitchen and a bathroom, and why a whole home is priced from a walkthrough, is set out in what a remodel costs in Reno and Sparks.
02Out or up
Going up means the house underneath has to carry the new room.
Building out puts a new foundation in the ground, frames the room on it, and ties its roof into the existing one. The house you already have mostly keeps doing what it did. The big lines are the foundation, the roof tie-in and getting heat, power and water to the new space.
Building up asks the existing walls and foundation to carry a floor that was never planned for them. That usually means an engineer checking the load path (the route the weight takes from the roof down to the ground) and adding posts, beams or footings where a new point load lands, meaning a spot where concentrated weight comes down. The roof comes off for a while, a stair has to fit somewhere below, and the house is open to the weather until the new roof is on. Building out has its own big lines, the foundation and the roof tie-in, and in our pricing the two come out level. That is part of why the range is wide: whether your house needs new posts, beams or footings, and so where in the range it lands, is only known once we have walked it and the engineer has drawn it.
03The lot decides
Before anyone draws the room, the lot decides how much room you have.
Every parcel carries setbacks, the minimum distance a building has to keep from each property line, and most carry a limit on lot coverage, the share of the lot that buildings may cover. Together they decide whether the addition you have in mind fits at all, and whether it has to go up because it cannot go out.
Which rules apply depends on who reviews the address: the City of Reno, the City of Sparks or unincorporated Washoe County, each with its own counter and its own fee schedule. In unincorporated Washoe County, drawings are reviewed against the 2024 International Residential and Energy Conservation Codes with the Northern Nevada amendments, mandatory for submittals since 1 January 2026 (the county’s Adopted Building Codes page, read 24 September 2026); the two cities confirm their own edition at their own counters. How long that review takes, and what stalls it, is in how the permit timeline works in Reno and Sparks.
04What the range leaves out
Three costs sit outside any square foot number, and they are worth asking about first.
Impact fees and utility connection charges are set by the jurisdiction and vary by parcel, so no square foot figure can carry them; they are separate from the permit fee and they can be real money on an addition. An older house can turn up materials, such as old insulation or paint, that have to be tested and handled under their own rules once the wall it shares with the addition is opened. And site and access (a slope, a tight side yard, a winter start) change how the work gets done and what it takes.
None of those is a reason not to build. They are reasons to ask, early, what each number in front of you includes. When you are ready to see how we run one, our home additions work sets out the order an addition is built in.
05Questions
Three questions we get about addition cost.
Per square foot, our starting range is the same for both. Building out pays for a new foundation and a roof tie-in; building up pays for reinforcing the house below, a stair and a roof that comes off and goes back on. So the lot usually decides: if setbacks or coverage limits leave no room to go out, going up is the only way to add the space. We look at both before anyone draws.
Usually, yes, for some part of it. The permit needs drawings, and wherever the addition changes how weight comes down through the house, such as a second storey or a removed wall, a structural engineer sizes what carries it. In a design and build contract we arrange those drawings, so they are not a separate hire for you; how the design work is billed is set out in the design agreement.
Most families do, especially when the addition goes out at ground level and the existing house stays closed until the tie-in. The day the new room opens into the old one is the disruptive part. A second storey is harder to live under, because the roof comes off for a time, and we plan that with you before it starts.
06Keep going
Three pages that take the addition cost question further.
02
How the permit timeline works
Which counter reviews your address, what it asks for, and what stalls a submittal.
03
Where a remodel budget actually goes
The order money is committed in, what moves each trade line, and the places an estimate is usually too thin.
07Start a conversation
Thinking about adding on? We will walk the lot and the house with you.
The ranges on this page are where an addition starts. A number for yours comes from seeing the lot, the house it attaches to and what the jurisdiction allows there. Send us the address and the room you have in mind and we will set up a walkthrough.
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Request received.
We will call you back within one business day to set the walkthrough. If you need us sooner than that, call (775) 200-0648 now, Monday to Friday, 9:00 AM to 4:00 PM.