When you’re comparing a contractor estimate for an ADU, garage, or another construction project in the Atlanta area, it’s easy to skip straight to the number at the bottom.
But the total only tells you so much.
Two contractors can quote the same project and come back with very different numbers because they may not be pricing the same work. One estimate may account for site preparation, design coordination, permitting considerations, or access challenges while another leaves some of those details to be determined later.
Before you compare prices, make sure you understand what each contractor is actually offering.
Here are the questions worth asking.
What Should a Contractor Estimate Include?
Start with the basic scope of work.
For a backyard ADU, that might include site preparation, foundation work, construction, plumbing, electrical work, and interior finishes. But you should not assume every estimate includes the same things.
Ask the contractor to explain what is included in the price and what is not.
Work outside the building itself can matter just as much. Depending on the property, a project may involve grading, demolition, tree removal, construction access, utility coordination, or restoring areas disturbed during construction.
CottageSmith’s own project conversations regularly begin with the property itself—not just the building a homeowner wants to add. Site layout, existing structures, access, intended use, and local regulations can all affect how a project needs to be approached.
ADU construction services in Atlanta
Are Design, Permitting, and Site Planning Included?
A construction project involves more than putting up walls.
Drawings, site planning, engineering, permitting, and coordination with local authorities may all become part of the process. The important question is whether those items are already included in the estimate, priced separately, or still waiting to be determined.
That matters especially with ADUs.
What can be built may depend on the property, local regulations, setbacks, existing structures, access, and the intended use of the space.
CottageSmith’s current process includes phone consultations and property site visits, and its pre-visit communication describes a property analysis in which the team evaluates the site and considers local regulations before moving a project forward.
That does not mean every unknown can be solved during the first conversation. Ask what has already been evaluated and what still needs additional design, site, or permitting work.
Have Utilities and Site Conditions Been Accounted For?
Two similar-looking ADUs can require very different work depending on where they are being built.
Before comparing estimates, ask how the contractor has handled questions around:
- Water, sewer, or septic connections
- Electrical service
- Existing structures
- Trees or demolition
- Construction access
- Grading or other site preparation
- Planned pools, patios, decks, or other improvements
CottageSmith’s recent project notes show why these details matter. In actual consultations, the team has had to consider issues such as land changes, tree removal, construction access, existing structures, future outdoor improvements, and local restrictions before preparing a proposal.
The point is not that every project will require those things.
The point is that an estimate built around your property should reflect more than the square footage of the building.
Which Finishes and Selections Have Been Priced?
“Kitchen included” can mean a lot of different things.
Does the estimate include cabinets? Countertops? Appliances? Flooring? Fixtures? Installation?
And what level of materials has been assumed?
Some estimates use an allowance, which is an amount budgeted for a selection that has not been finalized yet. If the product you eventually choose costs more than that allowance, the project price may increase.
When allowances are used, ask:
- Which selections still need to be made?
- What dollar amount has been allowed?
- Does the allowance cover materials only or materials and labor?
- What happens if you choose something above or below the allowance?
A lower estimate is not necessarily a better estimate if important selections have simply been left undecided.
Why Can Two Contractors’ Estimates Be So Different?
If two contractors are looking at the same project, it is reasonable to wonder why their totals can be thousands of dollars apart.
Sometimes the difference is price.
Sometimes the difference is scope.
One contractor may have accounted for site work, demolition, permitting coordination, utility work, or other project requirements that another contractor has not yet priced.
One may be estimating around a clearly defined layout. Another may still be working from broad assumptions.
One may include certain finish levels while another uses allowances or exclusions.
Before deciding that one contractor is simply more or less expensive, compare the assumptions behind each number.
A useful question is:
“If I move forward at this price, what is still not included or not yet known?”
That answer can tell you more than the total itself.
What Could Change the Price Later?
An early estimate is often based on what is known about the project at that point.
As the design develops or the property is evaluated more closely, new information may affect the scope.
Changes can come from things such as:
- Site conditions
- Local requirements
- Changes to the layout
- Added features
- Material selections
- Demolition or access needs
- Information discovered during design or planning
Ask the contractor how changes are handled.
If something changes the scope, when will you see the revised cost? How will that change be documented? At what point do you approve it?
The goal is not to eliminate every possible change before a project begins. That is not always realistic.
The goal is to understand what has already been established and what still carries uncertainty.
What Should You Bring to the Estimate Conversation?
The more clearly you can describe what you want, the more useful the conversation can be.
CottageSmith’s recent intake process has included questions about:
- How the space will be used
- Desired size
- Bedroom count and layout
- Architectural style
- Additional features
- Property and site conditions
- Existing structures and trees
- Utilities
- Access
- Desired timeline
- Financing or cash preferences
You do not need to arrive with construction drawings in hand.
But knowing your goals—and being ready to talk about the property—gives the builder a better starting point.
What Happens After the Estimate?
There is no single next step that applies to every construction project.
The next step may depend on how much is already known about the property, the design, and the scope.
CottageSmith’s CRM shows a sales process that can include an initial phone conversation, a property site visit, proposal development, financing discussions, commitment, and contract. A recent CottageSmith project, for example, moved from a site visit into preparation of a rough plan, site plan, and proposal.
That is one project example rather than a promise that every project follows exactly the same sequence.
Before you leave an estimate conversation, ask:
- What happens next?
- What information is still needed?
- What additional planning or design work is required?
- Are there additional fees before construction?
- When will you receive a more detailed proposal or agreement?
- At what point does the project scope become final?
You should leave the conversation understanding both what has been decided and what has not.
How to Compare Contractor Estimates
When you have estimates from more than one builder, do not compare only the totals.
When comparing a contractor estimate from one builder with another, make sure the scope is actually comparable.
Compare:
- Scope — Are they pricing the same project?
- Site work — What property-specific work has been considered?
- Design and permitting — What is included, separate, or still unknown?
- Utilities — Have connections and existing conditions been addressed?
- Finishes and allowances — What quality level is assumed?
- Exclusions — What will you need to pay for somewhere else?
- Changes — How will additional costs be identified and approved?
- Next steps — What happens before the estimate becomes a construction agreement?
A detailed estimate should help you understand the project—not simply give you a number.
Questions to Ask Before Choosing a Builder
Before making a decision, consider asking each contractor:
- What exactly is included in this estimate?
- What is specifically excluded?
- Which numbers are firm and which are allowances?
- What assumptions have you made about my property?
- What site conditions could affect the price?
- Who handles permitting and coordination?
- How are changes to the project priced and approved?
- What happens after I approve the estimate?
If you are still evaluating contractors, CottageSmith’s guide to hiring an ADU builder can help you look beyond price when comparing teams.
In Georgia, homeowners can also review contractor licensing information through the State Licensing Board for Residential and Commercial General Contractors.
Ready to Talk Through Your Project?
A good estimate should give you more than a price. It should help you understand what your project involves, what has already been accounted for, and what still needs to be determined.
CottageSmith’s process begins by learning about your goals and your property so the team can better understand what your project may require.
Planning an ADU, garage, or another CottageSmith project in the Atlanta area?
