A remodeling contingency is money reserved for uncertainty.
It is not the same as an allowance for better tile, more expensive appliances, or additional rooms.
A useful contingency protects the project when legitimate work appears that could not be fully confirmed before construction: concealed water damage, deteriorated framing, old wiring, plumbing problems, structural corrections, or other conditions uncovered after demolition.
For many remodeling projects, homeowners use roughly 10% to 20% of the construction budget as an early planning reserve.
That is not a universal rule.
A newer home with limited wall opening may justify a smaller reserve. A 100-year-old Seattle house undergoing structural changes may justify more.
The percentage should follow risk.
Start With the Difference Between Contingency and Allowances
These two categories are often confused.
A contingency addresses uncertainty.
An allowance addresses a known item whose final selection or price has not yet been fixed.
Example:
The project includes a bathroom vanity, but the specific model has not been selected. The contract carries a vanity allowance.
That is not contingency.
Another example:
The contractor opens the bathroom floor and discovers that long-term leakage has damaged the subfloor.
That may be a contingency event.
If allowances are unrealistically low, homeowners can mistake predictable selection upgrades for “unexpected costs.”
United Signature’s guide to Avoid Surprises in Remodel Budgets explains why scope clarity and realistic allowances matter before contingency is even used.
When 10% May Be a Reasonable Planning Reserve
A reserve near 10% may be more reasonable when:
– the home is relatively modern;
– the project is well documented;
– limited demolition is required;
– plumbing stays largely in place;
– structural work is minimal;
– hazardous-material risk is low;
– existing systems have been evaluated;
– and the design is complete before construction.
Even then, the reserve should not be assumed to cover owner-driven upgrades.
If the homeowner changes the kitchen layout after demolition, that is a scope change, not a concealed condition.
When 15% to 20% May Be More Realistic
A larger reserve may be appropriate when several uncertainty factors are present.
Examples:
– older Seattle home;
– multiple walls being opened;
– structural wall removal;
– basement work;
– unclear permit history;
– old electrical or plumbing systems;
– signs of water intrusion;
– several wet rooms;
– major floor-plan changes;
– or incomplete records of previous remodeling.
The risks described in Hidden Problems in Older Seattle Homes That Can Change a Remodel Budget are exactly the conditions that can justify more contingency.
A larger reserve does not mean the contractor expects the project to fail.
It means the budget acknowledges what cannot be seen yet.
Contingency Should Be Based on the Right Number
If the construction budget is $300,000, a 15% reserve is $45,000.
But first ask what the $300,000 includes.
Does it include design?
Permits?
Owner-purchased appliances?
Temporary housing?
Sales tax?
Allowances?
Site work?
A contingency percentage is only useful if everyone understands the base to which it is applied.
For a whole-house project, the all-in budget should be organized into categories rather than one number.
The framework in How Much Does a Whole House Remodel Cost in Seattle? can be used to separate construction, soft costs, owner costs, and contingency.
What Should Contingency Cover?
Common legitimate uses can include:
– concealed rot;
– damaged subfloor;
– deteriorated framing;
– unanticipated plumbing replacement;
– electrical corrections;
– structural reinforcement;
– hidden moisture problems;
– undocumented previous alterations;
– difficult demolition conditions;
– or additional code-related work discovered when existing assemblies are exposed.
The exact contractual treatment depends on the agreement.
A contingency reserve is not permission to perform unlimited extra work without documentation.
The scope, price, and authorization process should still be clear.
What Contingency Should Not Cover
Do not use contingency as a disguised upgrade budget.
Examples that should usually be tracked separately:
– changing from standard tile to premium stone;
– adding a second oven;
– upgrading all windows after construction begins;
– changing cabinet species;
– adding a new bathroom;
– increasing the size of an addition;
– or redesigning completed work.
These are owner decisions.
Keeping them separate helps homeowners understand whether the project encountered real hidden conditions or simply grew in scope.
Can Preconstruction Reduce Contingency?
It can reduce uncertainty.
It cannot eliminate it.
Before demolition, the team may use:
– permit-history research;
– sewer scoping;
– electrical evaluation;
– moisture investigation;
– structural review;
– hazardous-material surveys;
– selective exploratory openings;
– and detailed site measurements.
Each investigation can turn an unknown into a known cost.
For example, if a sewer camera shows that the line needs replacement, that work moves out of contingency and into the base scope.
That makes the budget more reliable.
Why Older Homes Need a Different Approach
Older houses contain more history.
A wall may have been opened and closed several times.
Plumbing may combine materials from different decades.
Electrical work may have been extended gradually.
The house may have settled.
Water may have entered through a window or deck connection years ago.
A remodel does not create these conditions.
It reveals them.
The sequence in In What Order Should You Renovate a House? places investigation and structural work early for exactly this reason.
Contingency and Change Orders Are Not the Same Thing
Contingency is the budget source.
A change order is the documentation describing a change to the contracted work.
Washington L&I recommends putting changes to contracted work in writing rather than relying on verbal amendments.
That is good project practice even when the homeowner has a healthy contingency reserve.
Example:
The project has a $40,000 owner contingency.
Demolition reveals $6,500 of legitimate framing repair.
The contractor documents the added scope and price.
Once approved, the homeowner knows that $33,500 remains in the reserve.
Without documentation, contingency can disappear without a clear record.
Should the Contractor Hold the Contingency?
Contract structures differ.
Some contracts include a designated owner contingency.
Others keep contingency outside the construction contract as money the homeowner simply does not commit.
Some design-build agreements may manage contingency through clearly defined contract provisions.
The important point is transparency.
The homeowner should understand:
– how the reserve is calculated;
– who controls it;
– what qualifies for use;
– how changes are approved;
– and whether unused contingency remains with the homeowner.
What Happens If You Do Not Use It?
That is the ideal outcome.
Contingency is not a spending target.
If the project ends with $30,000 of unused reserve, that does not mean the project was under-designed.
It means the uncertainty did not turn into cost.
Homeowners can then keep the money or decide deliberately whether any optional upgrades are worth adding.
Do not expand the project automatically simply because contingency remains.
How to Set Your Contingency
Use four questions.
1. How much existing construction will be opened?
More demolition creates more opportunity to discover concealed conditions.
2. How old and well documented is the home?
Older and poorly documented properties usually carry more uncertainty.
3. How much structural and system work is involved?
Structural, plumbing, electrical, basement, and exterior-envelope work increase technical risk.
4. How complete is the preconstruction investigation?
A detailed project with strong investigation can move several uncertainties into the known scope.
Then choose a reserve that reflects those risks rather than copying a percentage from another project.
FAQ
Is 10% contingency enough for a remodel?
Sometimes. It may be reasonable for a well-defined, lower-risk project. Older homes or projects with extensive demolition may justify 15% to 20% or another project-specific reserve.
Do I give contingency money to the contractor upfront?
That depends on the contract structure. The agreement should explain how contingency is held, authorized, and accounted for.
Can contingency pay for upgrades?
It can if the homeowner deliberately chooses to use remaining funds that way, but upgrades should be documented separately from concealed-condition costs.
What if the remodel uses all of the contingency?
Review why. A reserve consumed by genuine hidden conditions is different from one consumed by repeated owner scope changes.
Should I keep an emergency fund beyond contingency?
For a major project, homeowners may also want personal reserves for temporary housing, moving, storage, or other costs outside the construction contract.