If he won't give it to you maybe go to your city/county/town and see if they will give you a copy.

A survey or a plat? He may not have had a survey done since the property was subdivided, but presumably the subdivision survey is on record with the town but your house may only be a placeholder on it. Why do you care? Aren’t the property corners marked?

Is your bank willing to finance the purchase without a map? The insurance company willing to insure it? I doubt it.

Your realtor should be acting as your representative in this matter ahead of the closing.

Why does your interior designer need a map of the property? Do you mean the builder is not providing the construction drawings ?

Yeah, don't see why an interior designer needs a "map" of the property. Also don't see why the builder won't provide one. Have your realtor make it happen.

My interior needs the map for the measurements/dimensions of the rooms to furnish

It would certainly help an interior designer to have a floor plan if they are helping to furnish a whole house ... I don't see why the builder would have a problem sharing just the floor plan page of the construction blueprint set. Maybe the builder "stole" someone else's house design, so he won't share any info!

With today's electronic devices, measuring is a lot quicker and easier.

I've never built a new house but I see here on Houzz no end of people who are doing just that and posting questions here to the pro interior designers who hang out in this forum, asking for advice on interior layouts long before any ground has been broken yet. They ask questions like: "Do you think we should have French doors or sliders to the deck? Do we have room for a penisula in the kitchen? Can we fit in a shower and a tub?:

They are posting drawings with measurements -- and nobody answers: "Wait until the house is built and then hire an interior design to measure the real inches, instead of these ones on the drawings."

Hello?

Doors and tubs etc. are part of the construction project . Furniture, drapes etc are not .

If this is a model that the builder uses in other subdivisions, you can also do some sleuthing work and ask if there are model homes in other locations?

What the designer wants is blurprints and no need for those since you are closing on Aug 7 IMO nothing should be bought until that date so measurements can be taken I never work off a blueprint .

Sure, if you are installing kitchen cabinets or doing a custom sized built-in pieces, but designers working on a whole new house would definitely like to have the floor plan for general size and layout purposes. I know I carried my building plan sized floor plan page and elevation pages when going out to visit vendors and make selections. My wood flooring vendor certainly appreciated it and of course they added that final quantities would be calculated once site measurements could be taken.

It really isn't an unusual request. Even large production/tract builders have basic floor plans in their marketing brochures!

If your interior designer is using the word "map" to mean "floor plan drawings", I would consider it a red flag. For residential design, "maps" are plot plans or site plans. Neither of which depicts the sizes of the rooms.

I am having a hard time imagining buying a new home without a floorplan. Normally, since you were not able to see the finished home, they show a model home and have floorplans and other marketing materials. How do you know if the home he is building is what he promised or agreed to build for you if you have no floorplan or information?

It sounds like you are buying a spec build and you don't own the house until August 7th. The builder of the spec build doesn't have to give you the plans. Ask your real estate agent to ask the sellers real estate nicely for a copy of the plans. If he says no then that's it. He owns the plans. You will have to wait and measure the rooms yourself.

I was told no by my builder. They consider the const drawings their IP.

This is a spec home being advertised near me.

https://www.propertyshark.com/homes/US/Home-For-Sale/PA/Palmyra/148-HUMMINGBIRD-WAY/139274016.html

Without a floorplan would you buy based only on the elevation picture?

I am seriously not understanding how you would buy a new build without a floorplan.

< I was told no by my builder. They consider the const drawings their IP.>

That is stupid. When you buy a house, you own the floor plan. If the builder won't give it to you, he does not own it because you have bought the floor plan with the house. It might be extra work to draw the floor plan after the house is built, but you will still own the floor plan once you have paid for the house. It is not his intellectual property after he has sold the house to you. If it were, he would be able to prevent you from measuring your house and drawing the floor plan yourself. Some builders are just stupid. If they were smart and competent, they would be more accommodating to their clients.

Of course you still have to take measurements after a build is completed because the builders might not build to their own specs - another reason why they do not want to share drawings.

I've had clients send me blueprints of buildings that they wanted me to work on, but it was better when they sent me Autocad files. Either way, the people who owned the buildings had access to the drawings, whether blueprints or *.dwg files.

You should be able to at least get the recorded plat of your property from you city or county government.

My builder wouldn’t give me the plans for my house either. They sent them to my mom who was my lighting consultant (her company was their lighting supplier) and I took a picture of them when she wasn’t looking. They had general floor plans online that contained disclaimers about not taking them literally as they’re free to make reasonable modifications as needed.

I took a tape measure on walkthroughs before closing and got what I needed that way.

construction drawings and blueprints are different from floorplans. I did get floorplans with an electrical plan walked a model home and typically that should be enough. But my understanding is that's not what the OP was talking about.
Even if the builder purchased the blueprints it is still theirs. They own it. I don't like it either but do expect me to get an attorney and challenge that. What a waste. When you buy an existing home how often does the seller handover the blueprints to you.

floor plans should be enough.

A floor plan is a beginning for a very rough draft, but still must be confirmed by an on site measurement. Things do not always turn out as planned on that floorplan! The plans may show 24" of room to stack back draperies, but a closet expansion in the field can have taken that away. Or, a mis measure during framing can mean the dining room and office are both 18" shorter than the plans show. Or the porch is 1' bigger.

No designer would start any serious design work without measuring in person. If you don't have access to the build, the designer would be busy interviewing you about your tastes and needs, and laying out the scope off work for the rooms that you want help with.

actually yeah good point. they did say my floor plans would not be exact so you couldn't really order shades based on that. My floor plans were enough to figure out furniture, area rugs drapes and electrical needs. but not detailed measurements. Anything requiring that I had to do after the build and some of it I was able to do during the build.