Extensions
Transform Your Home with a Bespoke House Extension
A well-designed extension is one of the most effective ways to increase your living space, enhance day-to-day comfort, and add long-term value to your property. At Select Casa, we specialise in delivering high-quality single and double storey extensions across Hertfordshire, Essex and surrounding areas – offering a complete, turnkey service from concept through to completion.
Whether you’re dreaming of a larger kitchen-diner, a new family living area, an additional bedroom, or a full wrap-around transformation, we manage every stage with precision, transparency and care.
Our Expertise in Extensions
We provide all major extension types, tailored to your property, requirements and budget:
Single-Storey Extensions
Ideal for opening up kitchens, creating open-plan living, or extending the rear/side of a property. Perfect for homeowners wanting a modern, spacious layout.
Double-Storey Extensions
Add significant extra space both upstairs and downstairs. This is one of the best ways to boost property value and accommodate growing families.
Rear Extensions
A popular choice for creating large kitchen/dining areas filled with natural light. Great for entertaining and modern living.
Side Extensions
Maximise unused side land and convert wasted space into functional rooms, utility areas or extended living spaces.
Wrap-Around Extensions
A powerful combination of side and rear extensions that completely reshape the property. Provides unmatched versatility and design freedom.
Kitchen Extensions
Create your dream kitchen with improved flow, more storage, better lighting, and beautifully integrated indoor–outdoor living.
Costs vary depending on size, design, structural requirements and finishes. We provide a detailed quotation — not a rough “per square metre” estimate — so you always know exactly what’s included.
Not always. Many extensions fall under Permitted Development, but this depends on the size, height, and location of the property. We advise on this during the survey.
Most single-storey extensions take 8–12 weeks, and double-storey extensions approximately 12–16 weeks, depending on complexity and weather conditions.
Yes — this is one of our major strengths. We coordinate every trade, handle building control stages, book inspections, and ensure compliance throughout.
Absolutely. Extensions not only increase usable space but can significantly raise the property’s market value, particularly in higher-value areas such as Epping, Loughton, Buckhurst Hill and Bishop’s Stortford.
Yes, but we also provide full architectural design and planning support through our trusted partners.
Built on Trust, Transparency & Consistency
Why Choose Us
Your Project, Properly Managed
Choosing the right company for an extension is crucial. Homeowners come to Select Casa because they want more than just a builder — they want a project partner who handles everything without stress, hidden costs or unreliable trades.
Transparent, Itemised Pricing
Our quotes are thorough, clear and honest — with all costs, materials and assumptions laid out from the start.
Full Turnkey Project Management
Unlike builders who only handle construction, we manage planning, design, trades, structural work and final finishes, ensuring everything runs smoothly.
Consistent Communication & Full Visibility
Every step of your project is recorded in BuildProjex, giving you real-time access to schedules, drawings, updates, photos and documentation.
Our Process
A Clear, Streamlined Approach
We have refined our process to make it simple, organised and fully transparent, ensuring your project progresses smoothly from concept to completion.
Survey & Consultation
We understand goals and gather measurements.
Design & Planning Support
Drawings, planning, and structural inputs prepared.
Fixed, Detailed Quotation
Transparent cost breakdown with full clarity.
Build, Manage & Deliver
Construction, inspections and handover coordinated.
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Modern Building Solutions & Skilled Craftsmanship
From architectural drawings to the final handover, we coordinate every stage of your project with clarity, organisation and care, ensuring a stress-free experience and results that exceed expectations.