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Planning a Home Extension in Dorchester? Here’s Why You Need the Right Architect

Updated: Sep 2


If you're considering a home extension in Dorchester, you're not alone. From period townhouses to modern edge-of-town homes, more and more local homeowners are choosing to improve rather than move.

But here’s the truth:

A successful extension isn’t just about space. It’s about planning strategy, design clarity, and long-term value. That starts with choosing the right architect.

At Rosenkelly Architectural Design, we provide architectural services tailored to Dorchester, guiding homeowners through planning, design, and building regulations with confidence and creativity.


Extensions and new builds image
Extensions and new builds image

Why Extend in Dorchester?

Dorchester offers a rare mix: beautiful architecture, strong schools, excellent transport links, and rising property values. That makes it a great place to invest in your home.


The most common extension types we see in and around Dorchester include:

  • Rear kitchen extensions

  • Two-storey side extensions

  • Loft conversions with dormers

  • Garden rooms and detached studios

  • Internal reconfigurations to open up older layouts


But what works in one street may not be possible in another, especially with heritage constraints, Article 4 Directions, or conservation zones around areas like The Grove, Prince of Wales Road, or High East Street.


That’s where a local, qualified architect makes all the difference.


What Rosenkelly Offers for Dorchester Extensions

We are a Dorset-based, ARB-registered architectural design practice, working with homeowners across the Dorchester area to unlock space and value with clarity and care.


Our services include:

  • Feasibility and concept designLet’s explore what’s possible before committing

  • Planning drawings and submissionHigh-quality, policy-aware drawings that give your proposal the best chance of approval

  • Building regulations packagesAll the technical information your builder will need to get started, fully compliant and detailed

  • 3D visuals (on request)For clients who want to better understand how their project will look and feel

  • On-site consultationsWe’re based locally and happy to visit your home


Why Work with an Architect for Your Extension?

We understand the temptation to go straight to a builder or technician. But here’s what you miss:

  • Design that fits your life, not just your plot

  • Planning guidance that saves time and stress

  • Confidence that you’re not over- or under-building

  • Clear information for accurate builder quotes

  • A long-term asset, not just short-term space


Working with a qualified architect can also increase the resale value of your home far beyond the cost of the design work.


Dorchester Clients: Here's What to Expect

If you live in or near Dorchester and are thinking about an extension, we typically start with a no-obligation in-person consultation.


We’ll visit your property, discuss what you’re trying to achieve, and explain the process including timelines, planning risks, and how we’d approach your specific site.


You’ll then receive a fixed fee proposal based on your project’s size and complexity. No vague estimates. No unexpected extras.


Our Serivices

We can help with:

  • Rear and wraparound extensions

  • Barn conversions

  • Self-build homes near Dorchester and Weymouth

  • Sensitive designs in conservation and AONB areas


Your project could be next.


Let’s Talk About Your Extension

Whether you’re early in your thinking or ready to move forward, we’re here to help you design with confidence.



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