Simple Listing Site

I am building a office listing website. The main page is all the listings and the 2nd page is a details of the listing.
I need to have a simple admin for it. The admin needs to see all the listing, be able to add a new one, edit the existing ones.

Here are the pages that I’ll design up and will need to be sliced into html/css. Then a database will need to be created and the pages connected to the database.

Front end:
Home page with listings
Listing details page