Brokered by HomeSmart Connect, LLC · Each office independently owned and operatedThe New Construction Home Buying Process, Step by Step
- The order is: sort financing, choose the builder and community, choose the lot and floor plan, sign the builder’s purchase agreement, select finishes, watch the build, inspect, close.
- Bring your own agent to the very first visit. Many builders will not recognize representation once you have registered on your own.
- The builder’s purchase agreement is the builder’s document. It is not the standard Illinois contract and it does not behave like one.
- Plan on roughly six to nine months from signed contract to move-in on a typical build, and expect the closing date to move at least once.
- A brand-new house is not an inspected house. Hire your own inspector twice: before drywall, and before closing.
The new construction home buying process looks simpler than a resale purchase and is not. There is no seller to negotiate with, no inspection contingency fight, no chain of prior owners. What replaces all of that is a contract written entirely by the company building the house, a sales office staffed by that company, and a set of decisions you make months before you can see what you bought. Most of what ranks on this topic is written by builders, lenders or national portals, which is to say it is written from the other side of the table.
This is the buyer’s version, written for people building in St. Charles, Geneva and Batavia. If you want representation into a specific community rather than a guide, start with a new construction real estate agent for the Tri-Cities.
The steps, in order
- Get a lender letter first. Not because the builder demands it, but because it sets the number every later decision is measured against.
- Choose the builder, then the community, then the lot, then the plan. That is the order of consequence, and most buyers do it backwards.
- Bring your agent to the first model home visit. Before you sign a registration card.
- Sign the purchase agreement only after your attorney has read it.
- Select structural options at the design stage. These close first and cannot be added later.
- Select finishes at the design center, with your total already written down.
- Visit at pre-drywall with an independent inspector. Photograph everything.
- Lock your rate against a realistic completion date, not the optimistic one.
- Final walkthrough, punch list, then close.
Choose the builder before you choose the house
Floor plans are easy to compare and they are the least durable part of the decision. You live with the builder’s work for thirty years and with the floor plan you chose in an afternoon.
Three things to do before you fall for a model:
- Walk their finished streets, not their model. Find a neighborhood the same builder completed three to five years ago in Kane County and look at the trim, the driveways and the grading. That is what your house looks like at year five.
- Ask what the warranty actually covers, in writing. Most builder warranties run in tiers: a short period on workmanship, longer on systems, longest on structure. Get the document, not the summary.
- Pull the public record. Permits and inspection history for a property are public. The Kane County building and development offices and the municipality itself hold this, and a quick call tells you whether a community has been moving on schedule.
The registration trap
This is the single most expensive mistake in new construction and it happens in the first ten minutes.
When you walk into a model home, you are asked to sign in. That card is not a guest book. For most builders it registers you as their customer, and many of them have a written policy that an agent can only represent you if the agent accompanied you on your first visit. Sign in alone on a Saturday and you can lose representation on a purchase you have not even made yet.
The sentence to say at the door, before you take a pen: I am working with an agent, and she will be registering me. If your agent cannot be there, call her first and have her register you by email that day. It costs nothing and it is not recoverable afterwards.
Worth knowing: the sales consultant in the model home is employed by the builder and represents the builder. That is normal and it is not a criticism. It just means that if you arrive alone, nobody in the room is reading the contract on your behalf.
Reading a builder’s purchase agreement
Resale buyers in Illinois sign a standard, board-approved form that has been negotiated over decades to sit roughly in the middle. A builder agreement is drafted by one party, for one party.
| Standard Illinois resale contract | Builder purchase agreement | |
|---|---|---|
| Who drafted it | Multi-board form, industry negotiated | The builder’s counsel |
| Attorney review | Customary short window to modify | Often presented as non-negotiable |
| Inspection contingency | Standard | Frequently limited or absent |
| Completion date | Fixed closing date | Estimated, with delay language protecting the builder |
| Deposit | Refundable within contingencies | Often partly or wholly non-refundable |
| Dispute resolution | Courts | Binding arbitration is common |
None of that makes a builder contract unfair. It makes it one-sided by design, which is a different thing. Your move is to have a real estate attorney read it before you sign, ask for the two or three changes that matter most to you, and accept that some will be refused. Builders do negotiate, more often on incentives and allowances than on contract language.
One Illinois note: a builder selling a new home is generally not completing the seller disclosure report a resale seller would under 765 ILCS 77, because there is no prior occupancy to disclose. Your protection on condition is the warranty and your own inspector, not a form.
Base price, lot premium and the word “included”
The number on the sign is the base price for the smallest configuration of that plan on an unremarkable lot. Three things sit on top of it before you have chosen a single cabinet: the lot premium, required structural options for the elevation you liked, and community fees.
Ask the sales office for the full itemization in writing on the day you get serious: base, lot premium, elevation, structural options, design allowance, and any association or community fee. Then ask which of those are financeable and which must be paid at signing. That one sheet of paper is what keeps the number you were quoted alive until closing.
Upgrades: what the appraiser sees and what you eat
Every upgrade is spending. Only some of it comes back.
| Structural, decide early | Cosmetic, can wait |
|---|---|
| Extra bedroom or bathroom, finished basement, ceiling height, room extensions, rough-ins for future work, garage size, additional windows | Backsplash, light fixtures, cabinet hardware, paint colors, mirrors, closet systems, landscaping |
| Cannot be added later without major cost. Appraisers compare these directly against other homes. | Can be done after closing, usually for less than the design center charges, and appraisers give them little weight. |
The practical rule I give buyers: spend on anything involving concrete, framing or plumbing, and defer anything you could change on a weekend. An appraisal has to find comparable sales, and a comparable sale can see your finished basement. It cannot see your upgraded pendant lights.
The three visits worth showing up for
You are allowed to see your house during construction, within the builder’s scheduling and safety rules. Three moments matter more than the rest.
- Pre-drywall. The most important hour of the whole build. Framing, plumbing, electrical and HVAC are all visible and nothing is hidden yet. Photograph every wall, in order, with the room visible in frame. Those photos are what you use in three years when you want to hang a television or find a pipe.
- Mechanical rough-in. Confirm that the outlets, switches, cable drops and hose bibs match what you selected, while moving them is still a small job.
- Final walkthrough. Slow, with a notepad, and never on the same day as closing if you can avoid it.
Bring your own inspector to the first and the third. A new house passes municipal inspection, which confirms it meets code. That is not the same as an independent professional checking the work on your behalf, and the Consumer Financial Protection Bureau describes a home inspection as exactly that: your own assessment, arranged by you.
Financing and the closing date that moves
Rate locks have expiry dates and builds do not. That is the whole tension, and it is worth a conversation with your lender the week you sign rather than the month you close.
Two questions to ask: what happens if completion slips past my lock, and what does an extension cost. Builders often offer an incentive to use their preferred lender, which can be genuinely worth taking, but compare the whole offer rather than the headline. The CFPB’s home buying process guide and HUD’s buying a home resources both walk through comparing loan offers without a sales pitch attached. Route the specifics to a lender; this is not lending advice.
Final walkthrough and the punch list
Walk the house with the builder’s representative, a notepad and painter’s tape. Mark every defect physically on the wall as you find it, and write the same list down.
Check the things that are expensive to fix later: run every faucet and flush every toilet, open and close every window and door, test every outlet, run the heat and the air for ten minutes each, and look along the drywall seams with a light held flat against the wall. Then ask for the list in writing with dates against each item, signed. A punch list that lives only in a conversation is a punch list that gets done eventually.
My honest take: the model home is staffed by the builder’s salesperson, and that person is usually excellent at their job. The job is selling the builder’s houses. Nothing dishonest about it. It just means the only person in the room reading a one-sided contract for you is the one you brought, and you have to bring them on day one because the rules do not let you add them on day thirty.
If you are weighing a new build against an existing home, the trade-offs come down to timing, condition and what you can change. Run your own criteria through the Tri-Cities home search and compare what is already standing. Buying for the first time changes the sequence a little, and that is covered on the first-time home buyer page. For what these towns are like to live in rather than to buy in, start with the St. Charles neighborhood guide.
The new construction home buying process rewards people who make the structural decisions early, read the contract before signing it, and show up twice with their own inspector. Everything else is finish selection, and finish selection is the fun part.
Going to look at a model home this weekend?
Call before you go. Kelly Lach is a Top 3% agent and St. Charles resident representing new construction buyers across St. Charles, Geneva, Batavia and Kane County. Call 630-674-0424.
Questions new construction buyers ask
Can I bring my own agent to a new construction community?
Yes, and you should bring her on the first visit. Most builders have a written registration policy that recognizes a buyer’s agent only if the agent accompanied the buyer on that first visit or registered them before it. If you sign in alone, many builders will not recognize representation later on that community. The builder pays the buyer agent commission out of the same budget either way, so bringing your own representation does not raise your price.
Do I still need a home inspection on a brand-new house?
Yes. A municipal inspection confirms the work meets code; it is not an assessment done on your behalf, and it does not cover workmanship or finish. Hire an independent inspector twice: once at pre-drywall, while framing, plumbing and wiring are still visible, and once before closing. Many buyers add a third at the end of the first warranty year, while the builder is still obliged to fix what is found.
What happens if my build runs late?
Read the delay language in your purchase agreement, because that is what governs it, and builder agreements are usually written to protect the builder’s schedule. Practically, plan for movement: keep your lease or your current sale flexible near the end, ask your lender what a rate lock extension costs before you need one, and get any revised completion date in writing rather than by text from the sales office.
Are builder incentives negotiable?
Often, more so than the contract language and more so than the base price. Builders protect the headline price because it sets the comparable value for every other home in the community, so the flexibility tends to show up elsewhere: closing cost credits, a design center allowance, a structural option included, or a rate buydown through their lender. Ask for the incentive in writing on the same sheet as the itemized price, and compare a preferred-lender package as a whole rather than on the advertised rate alone.