- Changing from your existing masonry fireplace to the linear gas fireplace in the photo you posted a link to would likely be fairly expensive, as it would require removing/modifying the masonry of your existing fireplace, but there are other approaches you might consider. One of the keys to modern is minimalism. You might try keeping the appearance as uncluttered as possible - perhaps by removing an existing mantel or stripping away other elements to leave only the most essential parts. If it is a wood burning fireplace, the building code requires that you leave non-combustible hearth protection in front of the fireplace, but you might be able to change the hearth material to make it more modern (pink wall with hearth flush on floor). The other thing you might consider is changing over to a modern gas burner, with glass media or stones (first photo, with black mantel). There are gas inserts that are beautiful as well last photo with stone wall), but the investment goes up when you get into a full system with firebox, surround, venting etc. If you have a photo of your current situation, we might be able to tailor our suggestions to be more helpful.

Depends on what kind of a look you want to achieve and also your budget. To get a brick wall look you can go for actual brick cladding, textured paint or a 3D wallpaper. Can you share a reference image of what you're looking for?

Ardhendu, What are the walls made of ? You may not need plastering for this wall if it is made of red bricks. Else there are multiple ways to achieve the look. Brick tiles, plaster compound are the most prevalent ones. Thanks Nitin CORNERSTONE DESIGNS , Bangalore

nice