My work is no longer about doing additions. I’ve had a series of midcentury projects over the past two years where clients didn’t want to add square footage. We were charged with the task of reasonably and sensitively integrating these dwellings with modern living. It is more about an interior remodel. For all intents, it is about maintaining the original and iconic look of the houses.

John Bertram, architect, Bertram Architects

While attending Las Vegas Furniture Market last week, I got some nice validation after seeing some of my favorite new elements on display: Rose gold accents, barely-there blush pink, and navy blue lacquer were shown everywhere! ... I was pleased to see manufacturers finally moving away from reclaimed wood to a more finished look and warmer tones. Hooray for walnut!

Heather Ashton, principal, Heather Ashton Design and creative director of HD Buttercup

Sustainable designs can be as vibrant and varied as L.A.’s architecture. Our high-end clients want ... design that minimizes their footprint while maximizing their lifestyles.

Cassy Aoyagi, landscape designer, FormLA Landscaping, Inc.

One big trend I’m seeing for 2015 is very unique and artistic details. ... The character, creativity and detail you can now find in kitchen and bath surfaces are astounding. We’re currently pitching tiles shaped like cassettes, others comprised of vintage leather belts, and all sorts of other imaginative products.

Kishani Perera, interior designer

Whether the residence is small or large, the kitchen is disappearing. In apartments the micro-kitchen is en vogue, since they take up less square footage. In luxury housing, the kitchen is still the gathering spot, but the appliances disappear, overhead cabinets are removed and the feeling is more open plan.

Elizabeth Lowrey, principal and director of interior architecture Elkus Manfredi Architects

The ascent of sustainability bodes extremely well for the housing industry and interior design. It takes architecture back to the basic elements, the rudiments of place and design and quality and life: fresh air, massive natural light, strong visual and, if possible, physical indoor/outdoor connections.

Michael Lehrer, founder and principal of Lehrer Architects

Transformative spaces are in. The sharing economy is redefining how we design environments and objects. People want flexible, modular seating that allow for perching.

David Rockwell, architect and interior designer, Rockwell Group

I’m seeing an increased appreciation for 21st Century decorative artists and artisans. Up until now, vintage pieces were really the star of the show, but now contemporary pieces of makers such as Herve Van Der Straeten and Mattia Bonetti are being coveted and collected more than ever.

Natasha Baradan, interior designer

19th century American and English Regency antiques are poised to make a comeback. They’re extremely undervalued and they could be mixed in with just about anything, if you know what you’re doing.

Louis Navarrete, interior designer

Insurance companies are going to look at the amount of money they are paying out in treatment for chronic diseases, and they will determine that prevention pays better than treatment. They'll realize they can make more money from healthy clients than sick ones, and they will finally take the plunge.

Dr. Robert Lustig, pediatric endocrinologist at UC San Francisco and author of books including “Fat Chance: Beating the Odds Against Sugar, Processed Food, Obesity and Disease”

Cities and states are looking for ways to change the food environment to make healthy choices the easy choices. My list includes restrictions on marketing junk foods and beverages to kids, getting vending machines out of schools, committed implementation of the new school nutrition standards [and] food and nutrition education in schools with gardens, whenever possible.

Marion Nestle, nutrition activist, author and Paulette Goddard professor of nutrition, food studies and public health at New York University

Lifestyle medicine will become a global movement. I predict (and am working to create) a future in which the public increasingly rejects fads, quick fixes, false promises and pixie dust — in favor of fundamental, actionable truths about dietary pattern, lifestyle practices and health. The 'fad diet' will die, and people will live better.

Dr. David Katz, founding director of the Yale Prevention Research Center

Meditation is going mainstream. As a result of both scientific studies plus pop culture icons, it seems everywhere you look someone is talking about "the M word." At Unplug, we are seeing people from 6 to 60 — first-graders to their school principals — looking to break away from their electronic devices for a mental timeout.

Suze Yalof Schwartz, founder and chief meditation officer of Unplug Meditation in L.A.

There's been a real cultural shift in what is considered to be aspirational, or beautiful. It used to be that people wanted to be these skinny little waifs. But now they want to be toned. Really, truly healthy. Athletic. They want to be superhero kind of girls. The starving to get skinny? That's over.

Jennifer Cohen, author of "Strong Is the New Skinny"

In five years, everyone will have knowledge of the bacteria growing in their stomach. Knowing that will be considered as important as your basic vitals, as your heart. The wrong type of bacteria can amplify your fat storages. [For tests,] you'll use a tiny lancet, get a tiny drop of blood, drop it in the mail, get results back in a couple of days. There's no reason why you can't do it on a regular basis.

Dave Asprey, author of "The Bulletproof Diet" and "biohacker"

What I see happening is the continued focus on sugars as the prime dietary suspects in the cause of obesity, diabetes and their related diseases. [I see] a continuing decrease in the amount of sugars that we consume and, more important, our children consume, particularly sugary beverages such as sodas and fruit juices.

Gary Taubes, science writer, author of "Why We Get Fat" and a founder of the nonprofit Nutrition Science Initiative

I think that some of these misconceptions will be much more clear about gluten, so we understand who will benefit from a gluten-free diet and who will not. Gluten-free diets are used by people with fibromyalgia, autism, schizophrenia. Are these people really on the right track or not? We will have a much clearer idea if, when and how a gluten-free diet is good for you.

Dr. Alessio Fasano, founder and director of the Center for Celiac Research at Massachusetts General Hospital

People will come to realize that they have the power to control their health with nutrition and fitness. We're going to see the ability of the individual to literally self-diagnose and cure through low-tech strategies, by adjusting diet and lifestyle.

Mark Sisson, author of MarksDailyApple.com and creator of "The Primal Blueprint Diet"