Portsmouth, NH, Finish Room Over Garage

Building a custom Finish Room Over Garage in Portsmouth, NH, offers a great way to maximize your property’s potential. We build beautiful and highly functional spaces that blend perfectly with your existing home architecture.

Our skilled crew focuses on top-quality craftsmanship and fast timelines so you get exactly what you want. You gain a stunning new room built perfectly for your daily habits and family needs. We make the entire building process smooth and stress-free. Your home is your biggest asset, and we treat it with the utmost respect.

Reach Out Today!

Requesting a free estimate is quick, easy, and comes with no obligation to commit. Our team provides honest, transparent pricing so you can explore your options without pressure.

NOTE: We don’t offer repair or staining services

Expert Craftsmanship

Fast Turnarounds

Personalized Solutions

Unlock Hidden Square Footage

Transforming an empty upper level into a bright room is a fantastic investment. We handle everything required for your new garage space conversion, down to the finest design details. Securing our services is simple. Just contact us for an estimate, and we will outline a clear plan to build your ideal setup. You’ll love having extra room for hobbies, work, or guests.

Enhance Your Daily Lifestyle

Creating a FROG in Portsmouth, NH, gives your family the exact square footage they need. We specialize in smart layouts to design a comfortable guest suite or home office. Our team ensures a seamless build tailored directly to you. You’ll love spending time in a room that perfectly fits your specific goals.

Boost Your Property Value

When adding a room over the garage in Portsmouth, NH, you instantly increase the market appeal of your property. We use premium materials so your additional living area lasts for decades. We build structures that stand up to harsh weather and daily use. You receive beautiful results and true lasting value.

Trust Your Local Experts

We are the top choice for Small additions in Portsmouth, NH. Our process involves clear communication and tailored designs. You get a completely custom layout that matches your what you need. Reach out today to start planning your Finish Room Over Garage in Portsmouth, NH.

About Us

Allan Trant Exteriors, established in 2014, is built on a legacy of craftsmanship spanning three generations. Allan Trant, a third-generation carpenter, grew up immersed in the art of construction, learning the values of precision, hard work, and customer-first service. Today, his team specializes in creating high-quality decks and outdoor living spaces across New Hampshire’s Seacoast, delivering projects that reflect integrity, attention to detail, and lasting value.

We offer more than just basic construction. We prioritize personalized service and honest work for your next home expansion. By using premium materials like Trex and TimberTech, keeping clear communication, and ensuring on-time project completion, we turn your property dreams into reality. Rooted in community commitment, we build exceptional areas your family will cherish for decades. We are excited to partner with local contractors and build lasting professional relationships.

Testimonials

      EXCELLENT  
   Based on 21 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Christine Graham 
 
 
 
 Trustindex verifies that the original source of the review is Google. Allan and Samantha Trant are exceptional! They take quality seriously and are always professional. I love my new deck and highly recommend them if you are looking for high quality, professional, responsive, and clear communication regarding your project.
  
 
      Posted on Google  
   
   P W 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can't say enough about these folks.  I had 7 quotes and selected Trant's out of all of them as my neighbor had extensive work done by them and the finished quality was outstanding. They weren't the lowest or the highest. Right in the middle, but they were the ones I felt the most comfortable with. There were 3 in the crew and the same crew worked on the project from start to finish. They were all respectful, friendly, VERY easy to deal with, and in many cases went "above and beyond". The design and quality of their work and their attention to detail was absolutely impeccable. There were no "surprises" or incidental costs added on regardless of what issues they ran into during the project. The communication was great and timely. I would hire them back for any project in a New York minute. As a matter of fact, I am having them look at another project for my son as I write.
  
 
      Posted on Google  
   
   Kathleen Sawler 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exceptional service and craftsmanship. Always kept us informed on the process. Reasonably priced and very professional and respectful.
  
 
      Posted on Google  
   
   Pauline Rock 
 
 
 
 Trustindex verifies that the original source of the review is Google. Allan Trant’s Exterior Finish Work built a beautiful new deck at the back of our home in Dover, NH, and we couldn’t be more pleased with the results!

From beginning to end, communication was excellent. Allan’s crew was talented, professional, courteous, and respectful of our property. Their attention to detail and craftsmanship were exceptional, with every measurement and finishing touch completed with great care and precision.

Once the deck was finished, they returned to remove all of the debris, added crushed rock underneath the deck, and even put down topsoil and seed around the surrounding areas to give everything a clean, finished look.

We absolutely love our new deck and have already recommended Allan Trant’s Exterior Finish Work to several friends. We will gladly continue to sing their praises to anyone looking to build or replace a deck. We highly recommend them!
  
 
      Posted on Google  
   
   Yasmina 001 
 
 
 
 Trustindex verifies that the original source of the review is Google. Allan Trant’s Exterior Finish Work did our deck when we built our home in Greenland, NH, and we couldn’t be happier with the results. The attention to details was outstanding, and the entire process was professional from start to finish.
Our deck has become one of our favorite parts of our home.
If you’re looking for an honest contractor who delivers high-quality work, and beautiful results, I highly recommend Allan !
  
 
      Posted on Google  
   
   Kristy Osborne 
 
 
 
 Trustindex verifies that the original source of the review is Google. The craftsmanship on our front entry stairs is top-notch and exactly what we wanted!  Allan and team really take pride in their work and the project went smoothly from start to finish. Very happy with the result.
  
 
      Posted on Google  
   
   Alexandra Roy 
 
 
 
 Trustindex verifies that the original source of the review is Google. Can’t say enough good things about working with Allan & his team. The whole process was easy, transparent and professional. Hired them to do some work that impacted the inside and outside of a second floor window. After we contacted them they made it easy to schedule a time to meet and get a quote, understand costs, answered all my questions. They were very knowledgeable about what they were doing and how they would repair the problem. We trusted them to do the job and they did not disappoint! The team that came to do the job was well mannered and cleaned up after themselves. I can’t say I’ve ever worked with a contractor that was this put together. We recommend them and will also be using them again for future projects.
  
 
      Posted on Google  
   
   Stephen Myong 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had my deck completed last fall, and they did a wonderful job. The work was finished in a very timely manner, and they were flexible in handling additional work at a reasonable price. I would highly recommend Allan Trant’s Exterior Finish Work / AJT Properties.
  
 
      Posted on Google  
   
   Keenan Duffy 
 
 
 
 Trustindex verifies that the original source of the review is Google. I couldn’t be happier with the work and outcome of my new deck build.
Allan was a pleasure to work with and would highly recommend him to anyone.

Areas We Serve

Allan Trant’s Exterior Finish Work is a trusted deck and porch building company specializing in high-quality craftsmanship and efficient project completion. Serving the Seacoast of New Hampshire, the company is known for delivering customized outdoor living solutions with integrity and expertise.