Extensions

Extensions both single & multi story

Innovative Home Extensions

We specialise in maximising your living space with seamless home extensions. Whether you’re dreaming of a second storey, a stylish garage conversion, or a cosy loft expansion, our construction team has the expertise and experience to bring your vision to life.

Say goodbye to stress and let us handle the hard work for you. From navigating the planning process to selecting the perfect kitchen cabinets and bathroom fixtures, we’ll be by your side every step of the way. We understand that your home is a reflection of your personal style and taste, which is why we’ll work closely with you to ensure every detail is tailored to your exact needs and preferences.

Get ready to fall in love with your home all over again.

Start Your Project

Case Study

Stone Extension & Whole-house Upgrade, Castlethorpe

Two carefully detailed stone extensions transformed this family home — adding generous living space, improving flow, and future-proofing performance, all while respecting the original character.

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Experienced & Dependable

our Construction Procedure

Planning

We want to make sure you feel confident and satisfied with your project right from the start. That’s why we guarantee to work closely with you during the early planning stages, using our discovery questionnaire to ensure that your project aligns with your objectives and budget before you make any significant investments. Our goal is to create a positive and fulfilling experience for you.

Pricing

At Cognitive Construction, we don’t rely on guesswork when it comes to pricing. Instead, we take precise measurements and make accurate calculations to determine the cost of your project. And if you’re interested in comparing our estimates with those of other providers, we’ll provide you with an impartial comparison, so you can make an informed decision. We believe that transparency and clarity are crucial to building trust with our clients, and we’re committed to delivering both.

Building

We guarantee that our craftsmanship will meet all building code standards. In addition, a member of our construction team will be present at each check to accompany the building control officer and discuss any relevant concerns. Our commitment to quality and safety means that we take every precaution to ensure that your project is completed to the highest standards.

Amendments

During the construction period, we promise to be attentive to any adjustments you wish to make, and we’ll discuss the potential costs and schedule implications with you. Our goal is to meet your exact requirements and deliver your dream home. We’re committed to providing a personalised experience and will work closely with you to ensure that your vision is realised.

Completion

We guarantee that your project will be completed within an acceptable timeframe. In the event of any delays that are beyond our control, such as weather or material shortages, we promise to promptly inform you and take all necessary steps to get your project back on track. Our commitment to transparent communication means that you’ll be kept informed every step of the way, and we’ll work tirelessly to ensure that your project is completed on time and to your satisfaction.

Improvements

Our goal is to make every project the best it can be. If we identify an opportunity for an upgrade during construction, we’ll present it to you, giving you the option to take advantage of it. We’re committed to delivering high-quality results and believe that continuous improvement is the key to achieving this. You can trust that any upgrade we propose will be thoughtfully considered and designed to enhance the overall quality and functionality of your project.

Experienced Extension Specialists

Why Choose Us for Your Extension

We’re Master Builders who’ve completed dozens of extensions across Milton Keynes and Buckinghamshire. We handle the entire process from design and planning permission through to building control and final finishes.

Experienced team on site every day, not subcontractors you’ve never met
Fixed-price quotes based on measured quantities, no surprise costs
We treat your home like our own, keeping disruption to a minimum
Building control inspections hosted by our team, not left to you
Every stage checked against our quality standards before moving forward

Our clients trust us with their biggest investment. See what they say in our testimonials or look through our completed projects to see the results we deliver.

Testimonials

Accreditations

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