A well-designed rear extension turns underused space into the heart of the home. Extending into garden space creates an airy, open-plan layout that changes how you use your home. It lets you bring light and movement into every corner and everyday living.
At SM London Construction, we blend design and structure to create outstanding rear extensions. Every project is tailored to the property’s proportions and aesthetic, guided by our in-house Architectural team. We oversee the entire process, from planning to completion. This involves design, permissions, and construction, all done carefully and correctly.
Our specialists work across London boroughs. They provide clarity around permitted development and planning permission from the outset. We use clear communication and technical control to keep your project on course, from start to finish.
The best part is, we’re ready to start when you are. If you’d like to take the first step, book a consultation online or give us a call on 07961 817 505 or 0208 226 5511 today.



Every rear extension we create is tailored to its surroundings. Our team works closely with you to ensure the new space complements your home’s proportions, layout, and architectural style. No matter whether you're expanding a period terrace or a contemporary property, give us a call. We design extensions that maximise light, improve flow, and add lasting value.
Each project begins with a detailed consultation and planning stage. We oversee each stage, including architectural drawings, structural calculations, and local authority submissions. This way, we can ensure that everything meets London’s planning and building regulations. You can also pick roof styles, glazing, and materials that suit your home. Options range from flat or pitched roofs to lanterns, skylights, and glazed doors that complement your garden.
During construction, we manage every element with precision and care. Foundations, steelwork, and finishes are completed by skilled tradespeople under full project supervision. We work together to ensure the same high-quality craftsmanship in our House Extensions and Loft Conversions in London.
From the first consultation to the final inspection, we deliver every rear extension with care and precision. We provide transparent timelines and clear cost guidance so that you can make confident decisions from start to finish. Size, materials, glazing, and structure all influence your investment. That's why our team ensures each choice balances design, performance, and practicality. For this reason, typical project timelines range from three to six months, depending on the specification.
Beyond the build, our Aftercare service keeps your new space performing beautifully for years to come. We take pride in long-term relationships founded on quality and trust. You can see this for yourself in our client Reviews, recent Projects, and featured News updates.
Together, we can design a rear extension that boosts comfort, style, and lasting value.