At Rosenkelly Architectural Design, we provide tailored architectural services for small-scale flat block developments-typically up to 3 or 4 storeys-across Dorset and the surrounding areas. Designed for private developers, our approach combines budget-aware planning with a clear focus on spatial efficiency, compliance, and buildability.

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Whether you're developing a tight urban infill site or a suburban corner plot, we help maximise your project's value through thoughtful, well-proportioned design that meets both local expectations and national standards.

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Efficient, Affordable Architecture

We understand that flats must work hard for the space they occupy. That’s why we design compact, efficient layouts that still feel generous, bright, and market-ready. Our designs are grounded in real-world construction experience—so they look good on paper and work on site.

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We recognise the importance of budget, and we know where to make savings without compromising quality. At the same time, we’ll highlight opportunities to introduce well-placed architectural features that elevate your development and help it stand out in the market.

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Compliance as Standard

All of our flat block designs:

• Meet the Nationally Described Space Standard (NDSS) to ensure well-sized, functional living spaces.

• Include Approved Document M4(2) features as standard (accessible and adaptable dwellings) if required.

• Can be upgraded to M4(3) (wheelchair user dwellings) where required.

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These compliance measures are not just about ticking boxes—they contribute to comfort, longevity, and market appeal.

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Flexible Service Packages

We offer flat block design as either a complete, end-to-end architectural service, or as a standalone drawing package ready for your builder or project team.

Choose from:

• Full design and planning support – concept development, planning drawings, application management, building regulations packages, and more.

• Drawing-only packages – detailed plans, elevations, sections, and technical documentation delivered quickly and accurately.

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Whichever route you choose, we tailor our input to suit your development strategy, timescale, and investment goals.

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Dorset Expertise & Planning Confidence

Based in Weymouth, we have a deep understanding of Dorset’s towns, villages, and planning systems. That local knowledge gives us an edge in identifying the right scale, style, and approach for your site-and helps avoid common delays during planning or validation.

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We prepare every submission with care, making sure it’s aligned with local policies and supported by clear, well-explained documentation. Our experience across a variety of sites—from sloping coastal plots to compact urban gaps-means we know how to design with context, character, and policy in mind.

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Let's Get Started

If you're a private developer looking to build a small flat block—whether it's 3 units or 30-we're here to support you from the first sketch to final sign-off. Our designs are practical, professional, and always developed with compliance, buildability, and value in mind.

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Get in touch today to discuss your site and goals. We'll help bring your flat block project to life with clarity, creativity, and confidence.