Raj - What you say is true that a lot of interior design's margin is in furniture. I will not sugar coat it. And many designers may seem to be more interested in that when you bring them in. But I have had several clients call me over the years saying they are building a new home and would like to consult primarily on layout. When you speak to someone is tell them you are not ready to order furnishings or window treatments, but that you would like a contract that focuses on layout, planning, and interior detailing (i.e. doors, trims, floors) - i.e. the bones of the house. What I would suggest is when you call for a designer, you be prepared to pay a good consultation fee. A good rule of thumb is that you can expect to pay between $3-$10 per square foot of your home depending on the area of your country and the expertise/experience of the designer. If you are not averse to paying this type of fee, and communicate to the designer that your interest is in getting the best solutions, not in purchasing furniture at this time, I'm sure you will be able to get the level of service you desire. If someone you talk to doesn't seem thrilled to provide this kind of service, move on to the next person. Don't rely on "fame" or how well known someone is. They may be well known for doing show houses or just because they've been in the field the longest in your area. Not because they're the right fit for you. You could also check the Houzz directory for good designers in your area. The difficulty is that there are often decorators whose expertise and focus is really just on furnishings not so much on construction - and they serve a purpose for their clients. But there are other designers who provide more of a wholistic approach and have more familiarity with building a new home. These are the people you should seek out. Houzz is a fantastic community - and as I said you may get good advice here but there's really no replacement for someone to work with you in person. Sorry for the super long post but I feel passionately about this and I think this advice will best suit your needs.

I had storage under my stairs in our previous home and am having it done again. I loved it. I put seasonal things such as candles, wreaths etc., that I could not put in the attic in there. I had considered making shelves/built-ins in the hallway under the stairs but I decided I would rather just have storage. It is also a great place to store the vacuum cleaner. Mine is open all the way under the stairs, the framer was going to wall it off and make it like a coat closet but I felt like that was wasting space. IMO it's great.

One option, I would get a very large rug so that all the chair legs and at least one corner of the sofa is on the rug. I think I would also bring the table set away from the window a little more. I think there is enough space to place the two-seater opposite the table in front of the window. or bring the table forward toward the kitchen ....... With the sofa centered to the large window. They probably will not be opposite each other, but at an angle which is still ok. They might seem more functional for the table set to be closer to the kitchen. Another option is two rugs in wide runners. Creating a walkway through the center of the room. Still thinking the sofa center of the right window. Just some ideas :-)

Tsilanko, I would always recommend professional installation where needed. But what I am doing here is suggesting that WHEN you are planning to build or renovate, to consider how your plans will affect you in 20 or 30 years time. Split levels are very hep when you are young. A kitchen 3 steps down at 30 is rarely a problem, but might be a hazard at 60, or, as Marjie1059 suggested, if you break a leg. ... All my parents' homes were terrible for old people. They were forced to move to a bungalow in extreme old sge because the location and design of their home was more suitable for an active young couple with a large family than for an elderly couple with stroke disabilities. I would not want to move again, so my present home has features built in that make ageing in place simpler. Mostly small changes, like grab rails, and lever handles on doors and faucets. A major disability suddenly suffered requires major changes if permanent. I did look at this because it came up in the discussion, but if you look at the heading, Planning for Disability, it means just that. Plan ahead so you don't have to make expensive changes later on. But thank you for your advice, yes, major changes are not in the DIY domain.