House Extension Builders You Can Trust

Off Market Developments provides reliable building services tailored to meet every need, from concept to completion.

Get in touch with Off Market Developments today to discuss your project.

Need help?

0161 870 5181

Satisfied Customers

0 +

Off Market Developments

House Extension Rossendale

Off Market Developments specialises in designing and building high-quality house extensions across the North West, helping homeowners create more space and get more from their existing property. Whether you’re considering a rear extension, side extension, double-storey extension or a larger home transformation, our experienced team can manage your project from initial ideas through to completion.

We provide a complete house extension service, covering planning, design, construction and finishing. Our team works closely with architects, planners, structural engineers and experienced trades to ensure every extension is carefully planned and built to a high standard.

Bespoke House Extensions

Every home is different, which is why we design and build extensions around the individual property and the requirements of the homeowner. Whether you need additional living space for a growing family or want to completely transform the layout of your home, we can help develop a solution that makes the best use of the available space.

Our house extension projects can include single-storey rear extensions, side extensions, wraparound extensions, double-storey extensions and larger property renovations.

A professionally designed house extension can completely transform your home. Popular projects include creating larger open-plan kitchens and living areas, additional bedrooms and bathrooms, home offices, utility rooms, dining areas and modern family spaces.

Complete House Extension Service

Building an extension involves much more than the construction itself. Careful planning at the beginning of the project can help ensure the finished extension works with the existing property and meets your long-term requirements.

Off Market Developments can help coordinate the different stages of your project, from the initial design and planning process through to construction and final finishing.

Our focus is on making the entire house extension process as straightforward as possible while maintaining excellent standards of workmanship throughout the build.

Designed to Complement Your Home

A successful extension should feel like a natural part of your property rather than simply an additional room.

At Off Market Developments, we carefully consider the layout, materials, natural light and connection between the existing property and new extension. This allows us to create attractive, practical spaces that improve both the appearance and functionality of your home.

We use quality materials, modern construction techniques and energy-efficient building solutions to create comfortable living spaces designed for long-term use.

Create More Space Without Moving

For many homeowners, extending can provide an alternative to moving house. If you like your existing home and location but require additional space, a well-designed extension can allow you to adapt your property around your changing requirements.

From spacious kitchen extensions and open-plan family areas to additional bedrooms and home offices, there are many ways an extension can improve how you use your home.

A carefully planned extension may also improve the appeal and potential value of your property while giving you additional living space designed specifically around your lifestyle.

Experienced House Extension Builders

Every property and homeowner has different requirements, which is why we provide a tailored approach to every project. We take the time to understand your ideas, available space, budget and objectives before developing the right solution for your home.

From smaller extensions to complete home transformations, our team is committed to delivering high-quality workmanship, attention to detail and professional project management throughout.

If you’re looking for experienced house extension builders in the North West, Off Market Developments can help take your project from initial concept through to completion.

Contact Off Market Developments today to discuss your house extension project and discover how we can help create more space in your home.

Our Story

Off Market Developments began with a vision to deliver high-quality, sustainable property developments that transform spaces and communities.

Our Mission

Our mission is to create sustainable, innovative property developments that deliver lasting value, exceed client expectations, and enhance communities.

Projects completed

0 +

Off Market Developments has successfully completed a wide range of residential and commercial projects, delivering quality, innovation, and lasting value.

Years of experience

0 +

With years of industry experience, Off Market Developments brings expert knowledge, precision, and dedication to every property development project.

Skilled Workmanship

0 %

Our team takes pride in skilled workmanship, delivering exceptional finishes and reliable construction that meet the highest industry standards.

Our Services

We offer a comprehensive range of property development services, from planning and design to construction, renovation, and project management.

Extensions

specialise in high-quality house extensions that enhance living space, add value, and seamlessly blend with your existing property.

Masonry

Our skilled masonry team delivers precise brickwork and stonework, ensuring durability, quality, and lasting visual appeal.

Groundwork

We deliver reliable groundwork, including foundations and drainage, ensuring every project starts on solid ground.

Contact Us Today!

Ready to bring your vision to life? Book your project with Off Market Developments today and take the first step toward exceptional results. Whether you need expert support with house extensions, masonry, groundwork, or full property developments, our experienced team is here to guide you through every stage.

Get in touch with us to discuss your ideas, request a free consultation, or receive a tailored quote. We’re committed to delivering quality, reliability, and outstanding service from start to finish.

Our Project

Our diverse range of projects showcases our ability to deliver exceptional residential and commercial developments, each tailored to meet unique client needs.

Residence

House Extension

Residence

Stone House Extension

Residence

Full House Build

Hilti Demo

Brick Towers

Residence

House Build

Working Process

Design

We create innovative, functional designs tailored to each project, blending aesthetic appeal with practicality to bring your vision to life.

01

Planning

Our expert planning team carefully assesses each project, securing permissions, managing logistics, and laying the groundwork for success.

02

Construction

Our skilled construction team delivers high-quality workmanship, ensuring every build is completed safely, on time, and high standards.

03

Completion

We carry out thorough inspections and meticulous final touches to ensure each project is completed to perfection and ready for handover.

04 Our Experienced Team

Our team is made up of skilled professionals dedicated to delivering quality, innovation, and exceptional service on every project.

Ashley Spencer

Managing Director

Craig Tinker

Multi Skilled

Chris Davis

Stone Mason

What Our Clients Say

      EXCELLENT  
   Based on 14 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Mark Taylor 
 
 
 
 Trustindex verifies that the original source of the review is Google. ⭐⭐⭐⭐⭐ Couldn’t recommend Ash and Josh highly enough. They helped me out on a job preparing and getting a concrete slab ready for my extension, and the quality of their workmanship was excellent from start to finish. Both lads were reliable, hardworking and clearly take pride in what they do. Everything was done properly, the job was left tidy, and they went out of their way to help me get everything ready and keep the project moving. Really pleased with the finished job and wouldn’t hesitate to use them again. Top-quality workmanship and two genuinely good lads to deal with. Highly recommended! 👍
  
 
      Posted on Google  
   
   Ross 
 
 
 
 Trustindex verifies that the original source of the review is Google. Just had the groundwork’s and brickwork completed on a single storey extension from Josh and Ash. Really pleased with the work completed and the end result. Communication was excellent throughout the project, it was completed on time and left clean and tidy. They went above and beyond. Would highly recommend and will definitely use them again for future projects
  
 
      Posted on Google  
   
   Joe Heap 
 
 
 
 Trustindex verifies that the original source of the review is Google. I am very pleased with the work done on our patio, bearing in mind that it was a last minute request. The work was completed with professionalism, courtesy, friendliness and speed. After finishing the work, everywhere was cleaned as if they hadn't been there at all. I would certainly recommend their services. Thank you Josh, Ashley and the crew.
  
 
      Posted on Google  
   
   Rebecca Murray 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing work lads. 100% Trustworthy and reliable team. Great prices with perfect results 👌
  
 
      Posted on Google  
   
   JC Building Design Ltd 
 
 
 
 Trustindex verifies that the original source of the review is Google. We have worked along side Josh & Ash from the initial design enquiry to build completion. Josh is very proactive and reactive to all customer questions from the initial enquiry, ensuring the client is updated on every stage of the design even before the build commences. During the build correspondence is a must for clients, and Josh is 100% there for every question and minor details the client asks, reassuring for the client who is having their dream built. The quality and detail of their work is excellent, a "builder" who can actually read drawings and comfortably communicate with other professionals involved behind the scenes. It is a pleasure to work with Off Market Developments, and I have no hesitation in working along side them or recommending them to my customers.
  
 
      Posted on Google  
   
   Dom Wilmore 
 
 
 
 Trustindex verifies that the original source of the review is Google. We used Off-Market Developments for a wraparound double-storey extension. As most people know there is always apprehension and anxiety with building work which is why I chose Off-Market due to the recommendations I had in person. Ashley and his team were professional and kept communication clear from start to finish. The most important part of the job the workmanship was immaculate. Every target set was hit on time with great attention to detail in every aspect of the build, the lads were a pleasure to have at my property and I cannot fault them at all, I will happily recommend them to anyone for a job thankyou for such a great experience
  
 
      Posted on Google  
   
   Kelly Phillips 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently had a single-storey house extension completed, and I couldn’t be happier with the entire experience. From the initial consultation through to the final finish, everything was handled with professionalism, attention to detail, and clear communication. The team really took the time to understand what we wanted and offered helpful suggestions to make the most of the space. The build quality is outstanding — the new extension blends seamlessly with the existing house .It’s brighter, more spacious, and far more functional. The project was completed on time and within budget, which made the whole process stress-free. The builders were punctual, tidy, and respectful throughout, always keeping disruption to a minimum. I would highly recommend this service to anyone considering a home extension. It’s added real value to our property and genuinely improved our quality of life. A five-star experience from start to finish!
  
 
      Posted on Google  
   
   Tina Mcguire 
 
 
 
 Trustindex verifies that the original source of the review is Google. Ashley, Josh and Billy have been absolutely brilliant, they have done a fantastic job of our extension and garden! Highly recommended
  
 
      Posted on Google  
   
   Sheryl Smedley 
 
 
 
 Trustindex verifies that the original source of the review is Google. Absolutely outstanding workmanship. From the first meeting to the end result, these guys were so professional and polite. Very clean and tidy. Would highly recommend and would definitely use again. Good job guys and thank you very much
  
 
      Posted on Google  
   
   Simon Rourke (the_sawdust_room) 
 
 
 
 Trustindex verifies that the original source of the review is Google. Ash was very professional and hard working. He came to have a look and assess what was needed. He then gave me a quote and a date and time of when the job could be done. He arranged for all of the stock to be delivered before the job start date. He turned up early in the morning, and didn't stop until the job was completed. 100% happy with the work ethic, price and quality of work. Will definitely use again.
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more