Spring shaw

A modern sustainable home in open meadows and mature woodland

poolhouse

Garden pavilion at the water's edge, thoughtful details and simple forms

the orchard

Calm symmetry, created with beautiful natural materials

church road

Heritage reimagined, adding contemporary space.

Apple orchard

As light pours in, space flows into the garden

RIBA Chartered Architects Henley-on-Thames

Welcome to Simon Mack Architecture, you can find us in a lovely listed building, a former pub, just by the Town Hall. We design exceptional new homes and extensions across Oxfordshire, Berkshire, and Buckinghamshire. Specialising in high-value residential projects where thoughtful design, sustainable construction, and meticulous attention to detail create a home that transforms how you live. We are experts in understanding how to build happier, healthier homes.

Architecture Designed Around You

How do you want to use your space? Starting with this question, we design from the inside out; starting with the furniture layouts, working out where you want to sit, your views to the outdoors and how you move through your home, then the architecture evolves to make your interiors work beautifully and to make a home that you love. Through close collaboration, we understand your vision and translate it into detailed designs that contractors can build exactly as intended, keeping your project on budget and minimizing costly changes.

“Simon has led us through the process of designing, getting permission for and building a home. We've been really impressed by his creativity, experience and attention to detail, highly recommended!”

“Jargon-free, thoughtful, a good listener, and excellent advice. Simon listens and hears our preferences, and is a helpful guide through the process.”

Expert Architectural Services

As a RIBA Chartered practice, we guide you through every stage:

New house design and self-build projects
House extensions and renovations
Planning permission applications
Building Regulations and technical design
Construction management and contract administration

Sustainable Design That Lasts

Our mission is to create energy-efficient homes with minimal environmental impact, using sustainable materials and modern construction techniques. Our designs combine beauty with performance—-homes that feel exceptional to live in while reducing running costs and carbon footprint.

START YOUR PROJECT

Whether you're planning a contemporary extension, a new build, or a whole-house renovation, our experienced team delivers architecture that enhances your property and lifestyle.

Book a free 30-minute consultation to discuss your plans. We work throughout Henley-on-Thames, South Oxfordshire, Berkshire, Wokingham, Marlow, and surrounding areas.

Come in to our studio for chat, meet the team and our Springer Spaniel, Sam.

BOOK A CONSULTATION