Give me an estimate.

That’s the first thing everyone asks for.

“How much is this going to cost?”

If it’s something simple, like a deck, you might think the answer should be easy. But even then, I routinely see pricing swing 50% and more depending on who you hire.

Same deck. Same house. Wildly different numbers.

Why?

Because you’re not just pricing a project. You’re pricing:

• The builder’s experience

• Their business model

• Their overhead

• Their risk tolerance

• Their honesty

• Their workload

• Their process (or lack of one)

A “hustler” trying to stay busy will price differently than a seasoned builder with systems, staff, and reputation on the line. And even within those categories, no two builders price the same.

Now take that reality and apply it to:

• A bathroom remodel

• A whole house renovation

• An addition

• A custom home

The complexity goes up. The unknowns go up. The price variation goes up.

So if you post on Facebook asking, “How much should this cost?” and expect a real answer, you’re setting yourself up for confusion.

An estimate is not truth.It’s a rough guess.

What an Estimate Actually Is

An estimate is typically:

One person, from one company, using:

• Their past experience

• A quick mental breakdown of the work

• Maybe a couple calls to trusted subs or buddies

That’s it.

No detailed plans.No fully defined scope.No locked-in pricing from trades.

It’s a directional number.

And the reality is:

Most estimates are +/- 50%.

That’s not a flaw in the system.That is the system.

What a Bid Actually Is

A bid is something completely different.

A real bid is built from:

• Drawings

• Details

• Specifications

• Defined materials

• Known quantities

• Trade input

• Site understanding

This means your plans and decisions are at least 95% complete.

At that point, the contractor is no longer guessing.They are calculating.

They are:

• Sending plans to subcontractors

• Getting real numbers back

• Walking the site 

• Coordinating logistics

• Identifying risks

This process can take weeks.

And here’s the part most homeowners don’t realize:

Most contractors are not paid to do this. (They should be)

The person doing the bid is often:

• The owner

• The project manager

• The same person running active jobs

So they’re fitting your bid into nights, weekends, and gaps between paid work.

That’s why contractors are selective about bidding.

They are far more likely to invest time when:

• The project is well-defined

• There is a real relationship

• They believe they have a legitimate shot at winning

If you’re sending your project to five contractors with vague information, don’t expect five high-quality bids back. That’s not how this industry works.

What About AI?

How to Prompt AI for a Construction Estimate

Start by setting expectations with AI.

Tell it this upfront:

You understand that construction pricing has a wide range of variation based on location, builder type, business model, level of detail, and unknown conditions. You are not looking for a single number. You want a realistic range, including low, mid, and high scenarios, and what drives those differences.   That alone will improve the quality of the response.

Give It Real Information

Give it everything you can to reduce guessing.

Location. Provide your exact address. Costs are hyper-local.

Project Type + Scope. Be clear. Full gut, cosmetic, addition, structural changes, etc.

Size. Square footage of renovation or addition.

Level of Quality. Low, medium, or high-end.

Custom vs Standard. Stock vs custom. Simple vs detailed.

Age + Condition. When was the home built? Any known issues?

Systems. Are plumbing, electrical, HVAC being updated?

Site Conditions. Flat, sloped, tight access, occupied, etc.

Design Status. No plans, concept, or full drawings.

Selections. Anything already chosen helps.

Timeline + Builder TypeFast or flexible? Small builder, mid-size, or high-end?

Add Photos and Plans

Upload:

• Photos of the existing home

• Existing plans or sketches

• Inspiration images

• AI images of your desired outcome

The more visual context you provide, the more accurate the response becomes.

The Reality and What You’re Really Looking For

Even with all of this, it’s still just an estimate, never a bid. It’s still AI. It can be wrong. It can fill in gaps with assumptions that don’t hold up in the field. That part doesn’t go away.

But when you use it the right way, it can give you something surprisingly useful early on, often clearer and more direct than talking to five different builders before the scope is truly defined.

Because what you’re actually after at this stage isn’t a single price. You’re trying to understand the landscape.

You’re looking for a realistic range. You’re trying to see what pushes a project toward the low end versus what drives it higher. You’re trying to locate where your expectations sit within that spectrum.

That’s the value. Not certainty, but orientation.

The Truth Most People Don’t Want to Hear

If you want a number you can trust…

You need:

• Defined scope

• Real plans

• Thought-through selections

• Time and Patience.  

Without those, you don’t have a price.

You have a guess.

So What Should You Do?

So What Should You Do?Educate yourself before you talk to anyone. The best place to start is understanding who all the players are. Who you hire directly impacts the numbers you get, because every builder and plan creator approaches estimating and bidding differently, with different levels of detail, assumptions, and risk built in. That’s why you can see massive swings in pricing for the exact same project. Before you trust any number, you need to understand how it was created and who created it.

Learn more about all the different players here.  How to Build Your Project Team.