Teardown or remodel: how the money actually decides it
Most owners ask this as an architecture question. We think it is a cost question, and the answer usually falls out of three numbers you can get in about a week.
People arrive at this question holding a house they like parts of. In our experience the honest answer rarely comes from the parts they like. It comes from what the existing structure is worth to keep, once you have priced the work that has to happen underneath the work you actually want.
What follows is how we weigh it, not a rule you can look up. Where the decision runs into something the city actually decides — whether you need a demolition permit, whether the house goes in front of a review board, what you may put back — we stop and hand you to the page that cites the code.
The three numbers
Before an architect draws anything, we want these three. Two of them come from your agent and one comes from a builder. None of them requires a design.
- What the lot alone is worth, with no house on it. Your agent can pull this from recent teardown sales on your street in an afternoon.
- What the finished house is worth once your project is done — again from comparable sales, not from what you hope to spend.
- The cost of the remodel you actually want, priced by someone who has opened up a house of that age in that part of town.
If the design makes you touch every room, tear down. Once the scope reaches the whole footprint you are paying demolition prices for access, keeping foundations and framing you did not choose, and inheriting every surprise the walls were hiding — for a house that still has the old plan.
The exception we see hold up: a house whose bones and layout are already good, and whose problems are all finish-level. That is a real remodel, and it is usually the cheaper answer by a wide margin. The case we have learned to distrust is the middle one — a partial remodel that grows — because it prices like a remodel at the start and like a rebuild by the end.
When the third number lands within roughly a tenth of what a new build would cost, we treat the two as a tie and choose on the plan rather than the price. That margin is our own read on how much remodel budgets tend to move once walls are open — it is experience, not a surveyed figure, and your builder may weigh it differently.
Where this stops being judgment
Two parts of this decision are not opinion at all, and they can change the arithmetic above completely. Settle both before you price anything, because a house that cannot be demolished is not a teardown at any price.
What Austin requires before a house comes down, and what stops a teardown outright.
What makes a house a landmark, what puts it in a historic district, and the tests the city applies.
We do not restate either answer here on purpose. Age thresholds, notice requirements and review triggers are the kind of thing that moves, and a copy of them sitting on this page would go stale without anyone noticing. Those pages carry the citation and the verification date; this one does not.
What can stop you rebuilding what you have
Demolition and historic review are the two people expect. Four more come up often enough that we check them before anyone pays for a design, because each one can mean the house you are allowed to build is smaller than the house you are tearing down.
Whether the parts of your house that do not meet today's rules can be rebuilt at all — and why voluntary demolition is treated differently from fire or storm damage.
Whether your lot is in a mapped floodplain, and what that does to a rebuild.
Whether what you own is one legal lot, and what applies if it is smaller than today's minimum.
Which trees on your lot are protected, and how that constrains where a new house can go.
One more sits outside all of this: a deed restriction or private covenant recorded against your lot. The city does not enforce those and they are not in the land development code, so no page here can answer them. They are in your title work, and they can be stricter than anything the city requires.
Check the non-complying question first. It is the one that most often turns a teardown into a smaller house than the one that came down, and it is among the cheapest to answer — it needs a survey and an afternoon, not a design.
We run these checks ourselves on every project — they come from the address, the survey and the title work, not from a design. Send us the address and we will run them and tell you what we find. No charge and no strings. If the answer is that you cannot rebuild what you have, that is worth knowing before you pay for drawings.
Ask about your lotIf you tear down, what you get to put back
This is the half of the decision owners most often skip, and it is the half that decides whether a teardown is actually worth it. The lot you are clearing does not necessarily let you rebuild what is on it now — sometimes it lets you build considerably more.
What you are allowed to put back, and how the rules changed under HOME.
The cap on total floor area, and what counts toward it.
The sequence approvals have to come in, which is what sets your calendar.
Get the demolition and historic questions answered before you pay for a design. We have watched more money burn on drawings for a house that was never coming down than on any other single mistake in this process.
Written by KiliGray Homes from projects we have built in Austin.