@Mason_King
The stained glass is from Essential Housing Tools (EHT) which is a addon. It offers a huge variety of things to help accentuate a home.
Here is a link for it.
https://esoui.com/downloads/info1959-EssentialHousingTools.html
@Jayne_Doe
You'd be suprised by how much you can actually fit in the medium size houses. I have ESO+ so I got 600 slots. Right now I am sitting on 597.
I used EHT for the stain glass windows, some of the pictures and some ornaments but the majority is just using furniture, plants and lighting. For the garden, I did place some of EHT's plants which you can see in the first picture, and a tree which sits at the very far back of the garden behind the stable. Also, inside the kitchen area I used EHT's ivy along with eso's ivy to make it fuller, but the rest is all plants available on eso.
The reason I choose the Gardner house is because I noticed it wasn't really favoured by people due to the big open rooms, so I made it a challenge for myself to come up with something that made it really stand out. The original outside part felt underwhelming so by using the Alinor ballroom flooring and steps, this has created a far nicer setting to build up a garden, because as you can tell, I like gardens.