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Trusted House Extension Builders, Delivered Design and Build

Looking for a house extension builder who can transform your home with style, quality and care? Maxas offers premium home extension services, combining expert craftsmanship with personalised design solutions to expand and elevate your living space.

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Why Choose Maxas as Your Home Extension Company

At Maxas, we specialise in creating beautiful, functional home extensions that are tailored to your lifestyle and property. Our team of experienced tradespeople deliver outstanding results from start to finish, ensuring every extension project is completed on time, on budget and to the highest standards.

Comprehensive Home Extension Services

As a trusted extension builder, Maxas provides a full range of services to extend your home in ways that enhance both space and value. Our work includes:

Every extension is designed with practical use, compliance, and long-term durability in mind. We work closely with you to understand your goals and guide you through planning, design choices, and construction progress.

One Extension Builder. Multiple Specialist Teams.

Choosing the right home extension company means choosing a company that can manage every part of your project properly, without relying on disconnected subcontractors. With Maxas, your extension is delivered by a trusted team of specialists, working together under one group.

  • Maxas Design and Build – Complete design-and-build extension solutions, from concept to completion.
  • Maxas Developments – Professional building and construction expertise for larger-scale projects and high-quality structural work.
  • Maxas Plumbing and Heating – Reliable plumbing, heating and system installations to support kitchens, bathrooms and full extension builds.
  • Maxas Electrical – Certified electrical services for lighting, power, rewires, and smart home upgrades within your extension.
  • Maxas Renewables – Sustainable options, including renewable energy solutions to improve efficiency and reduce running costs.

This joined-up approach ensures your extension project runs smoothly, meets regulations, and achieves a consistently high finish, making Maxas a trusted choice for anyone searching for house extension builders.

Design and Build, All Under One Roof

We tailor each project to the unique character of your home, ensuring that your new extension blends seamlessly with your existing architectural style. From first sketch to final finish, our design and build approach means one point of contact and one team accountable for the entire project.

Double Storey Extension High Wycombe Exterior

Start Your Home Extension Project Today

Ready to transform your home with a bespoke extension? Contact Maxas, your go-to home extension company for quality, reliability, and exceptional service.

Frequently Asked Questions

Many home extensions fall under Permitted Development rights and won't need full planning permission, but this depends on your property, its history and the size and position of the extension. We assess this for you at the outset and manage the application if one is required, so you're never left guessing.
Most single-storey extensions take around 8 to 14 weeks on site, while larger or double-storey builds can run from 14 to 20 weeks. Timescales depend on scope, design complexity and how quickly decisions are made along the way. We give you a clear programme before work starts so you know what to expect.
Yes. We regularly work on period and older properties, taking extra care with foundations, structural tie-ins and matching materials so the new build sits comfortably alongside the original house.
There's no single "best" time. We work year-round, and starting sooner simply means the design, planning and quoting stages are out of the way earlier, so your extension is ready when you want it. Many clients prefer to plan ahead so building work lines up with quieter periods for their household.
Yes. We design every extension to complement your property's existing brickwork, roofline and proportions, so the finished result looks like a natural part of the house rather than an obvious add-on.
Fill in the form on this page or get in touch directly. We'll arrange an initial consultation to talk through your ideas, budget and timescales, then guide you through design, planning and build from there.