Award Winning Architectural Design Services

029 2115 0515
Tweedy Road, Bromley

Change of Use &
Remodelling
Specialists

Tweedy Road, Bromley

Interior Architecture

Trusted by professionals

MAAS GroupThe Press and JournalLazarouJelson HomesMoreland EstateDunphys Chartered Surveyors

Protect capital. Reduce planning risk. Generate stronger returns.

That's what happens when we give you a clear route through planning, and work with our technical team to help move your project forward.

Recognition

Awards & Credentials

Our commitment to excellence has been recognized across the industry.

LABC Registered

LABC Registered

Partner Authority Scheme

London Build Expo 2026

London Build Expo 2026

Sustainability in Construction Changemaker

BIID Registered

BIID Registered

British Institute of Interior Design

Best Architecture Firm

Best Architecture Firm

Caerphilly

0+
Projects
Completed
0
Years
Experience
0%
Planning
Approved

We are not here to sell clients the largest or most expensive proposal. We are here to identify the right solution—one that is thoughtful, viable and appropriate for the property and the people who will use it.

Common Questions From Property Developers & Investors

Clear answers to help you make better-informed decisions about your property or development opportunity.

That's exactly what we can help you establish. We assess the building, its existing use, planning context, layout and key constraints to understand what conversion opportunities may be available — from residential and HMO use to mixed-use and other viable alternatives.

The answer starts with understanding your building properly. Through feasibility and space planning, we can explore how your property could be configured, what may be achievable and how to make better use of the available space while considering planning and regulatory requirements.

No one can guarantee planning approval — but you can make a better-informed decision before applying. We assess relevant planning policies, the site's context, constraints and planning history where appropriate, then develop a planning and design strategy aimed at giving your proposal a robust basis for submission.

Find out what you're potentially buying before committing significant capital. A pre-acquisition feasibility assessment can help identify planning constraints, conversion opportunities and development risks that may influence whether the property is right for your strategy.

Start by understanding its highest viable potential — not simply its current use. We can explore change of use, conversion, remodelling and development options to identify ways an empty or underperforming building could be repositioned for residential, HMO, mixed-use or another appropriate use.

There may be more potential in your property than its existing layout suggests. Through feasibility, planning research and architectural design, we can explore opportunities to improve layouts, introduce new uses, increase usable space or reposition the building to create greater development value.

Working With Local Planning Authorities Nationwide

We submit to councils across England, Scotland & Wales — wherever your project is.

110+

Local Authorities

Change of Use

Some of the current and recent change of use projects.

Protect capital.
Reduce planning risk.
Save time.
Identify opportunities.
Increase property value.
Generate stronger returns.

Move your project forward with us. We are a team trusted with over 500 property projects across the UK.

As Featured InPress and Journal

Inside Esslemont & Macintosh, Aberdeen

Step inside our Category B Listed conversion in the heart of Aberdeen city centre — a former department store reimagined as residential apartments, as featured in the Press & Journal.

Read the article
Esslemont & Macintosh, Union Street, Aberdeen, January 1942

Jan 1942, Esslemont & Macintosh, Union Street, Aberdeen.

What We Do

Our Services

From first sketch to final approval — everything you need in one place.

Residential

Home Extensions & Conversions

Design drawings for single & double-storey extensions, rear extensions, side returns, kitchen extensions and more.

Learn more

Home Extensions & Conversions

Create the Space You Need

Make Better Use of Your Property

Potentially Increase Property Value

Strategy

Project Feasibility

We assess your site, budget, and planning context to give you a clear picture of what's achievable — so you invest with confidence.

Learn more

Project Feasibility

Understand the Development Potential

Identify Risks Early

Align the Proposal with Your Budget

Invest with Greater Confidence

Management

Project Management

End-to-end project management from planning through construction to completion — one point of contact throughout.

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Project Management

Support Through to Completion

Construction Progress Monitoring

Better Control of Time and Budget

Technical

Building Control Drawings

Building control drawings for England & Wales, and building warrant drawings for Scotland — fully coordinated packages.

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Building Control Drawings

Construction Details and Material Specifications

Coordinated Technical Design

A Reliable Record of the Approved Design

Reduce Unexpected Construction Costs

Planning

Planning Permission Application

We prepare and submit your full planning application — drawings, documents, and all correspondence with the council.

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Planning Permission Application

Complete Application Management

Fewer Errors and Avoidable Delays

Professional Council Liaison

Avoid managing complex forms yourself

Space Planning

Loft & Garage Conversions

Complete design packages for loft conversions and garage conversions including building regulations compliance.

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Loft & Garage Conversions

Expand Without Building a Large Extension

Improve Functionality and Property Value

Designed for Safety and Compliance

Conversions

Change of Use Planning

Expert change of use applications — offices to flats, shops to homes, HMO conversions and complex mixed-use projects.

Learn more

Change of Use Planning

Unlock Hidden Property Value

Identify the Best Planning Route

Explore layouts, unit numbers and space allocation

Reduce Planning Risk

Permitted Development

Permitted Development Application

Avoid unnecessary planning applications. We confirm what you can build under permitted development rights.

Learn more

Permitted Development Application

Save Time and Application Costs

Understand What You Can Build

Reduce the Risk of Unauthorised Work

Useful Evidence for Future Sales

Design

Architectural Design

Bespoke architectural design services for residential and commercial remodelling — from concept to planning-ready drawings.

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Architectural Design

Design Tailored to Your Objectives

Clear Drawings, Compare and Refine the Design

Progress with Greater Confidence

Not sure which service you need? We're happy to advise — free of charge.

Book a Free Call

Interested in Buying Commercial Land?

Our dedicated in-house software enables us to efficiently assess property and land opportunities, helping our team quickly determine their development potential and suitability for development.

Find Land
98%

of our customers achieve planning approval — trusted by commercial and individual property owners alike, whatever the project size.

Speak to an Expert

Watch how we turned a £275K house into a £420K house. Full Remodelling from a 3-bedroom house to a 5-bedroom house.

Hosannahs Change of Use and Remodelling Architectural Consultants - Bristol remodelling project transforming a 3-bedroom house into a 5-bedroom house, before £275K after £420K
Bristol Project

Before £275K · After £420K

Watch on Facebook
Insight for 2026

London's Commercial to Residential in 2026

Discover how changing use from commercial to residential is shaping London's property landscape in 2026 — and how to unlock value in your building.

Learn More
London street with Union Jack flag — commercial to residential conversion insight 2026

Frequently Asked Questions

Common questions about our change of use, planning and architectural design services.

Yes. We can prepare the architectural drawings and supporting design information required for planning and manage the application process through submission and liaison with the planning authority.

Yes! We work with clients across England, Scotland, and Wales. We create detailed plans tailored to your vision and requirement. We've completed projects from Aberdeen to London.

A standard planning application typically takes 8-13 weeks for a decision from submission. We handle the entire process including preparing drawings, submitting the application, and liaising with the planning authority. Our 98% approval rate means your project is in safe hands.

We work with existing buildings that have the potential for a new use or greater value — including offices, shops, warehouses, pubs, hotels, care homes, HMOs, residential properties, churches, community buildings and listed or heritage properties. From commercial-to-residential conversions and HMOs to mixed-use, heritage and residential remodelling, we provide the planning, architectural design and technical expertise to help unlock each building's potential.

Yes. We prepare Building Regulations drawings in England and Wales and Building Warrant drawings in Scotland, together with technical details and specifications required to progress approved designs towards construction.

Read About Us

Hosannahs is a UK-wide interior architecture practice specialising in Change of Use & Remodelling, helping property owners, investors and developers unlock the potential of existing buildings through feasibility, planning, architectural design and technical expertise.

Meet the Team
The Hosannahs Difference

Why People Choose Us

We've helped over 500 homeowners bring their extension dreams to life. Here's what sets us apart.

Your Approval, Our Mission

You've found the perfect property. The numbers work. But late at night, one thought keeps you up: "What if planning says no?" That's why we revise until it's right because your approval means you can finally breathe.

Complete Planning Support

From initial sketches to council submission, we manage every detail of your planning application. You won't touch a single form.

First Designs in 14 Days

Your initial drawings arrive within two weeks of our site visit. We move fast because we know you're eager to see your vision come to life.

98% Approval Track Record

Our designs are crafted with planning approval in mind. We understand what councils look for and design accordingly.

Fixed Price Guarantee

The price we quote is the price you pay. No hidden extras, no surprise invoices — complete transparency from day one.

How It Works

Your Journey With Hosannahs

From first call to approved plans — our lovely team will guide you through every step with clarity and care.

1

Free Consultation

Same day

We discuss your ideas, budget, and timeline. No obligation, just helpful advice.

2

Site Visit

1 day

We visit your property to assess the space and understand the full potential.

3

Design Development

2-4 weeks

Our design technologists create detailed plans tailored to your vision and requirements.

4

Planning Submission

8-12 weeks

We handle all planning applications and liaise with the council on your behalf.

5

Building Regulations

2-3 weeks

We prepare a complete drawing package for Building Regs and connect you with trusted specialists.

6

Project Build

8-16 weeks

Our team manages the construction phase — coordinating contractors and keeping your project on budget.

7

Project Complete

You decide

Final inspections, snagging, and handover. Your transformed space is ready to enjoy.

Ready to start your project?

Book Your Free Consultation

What's next?

Book a friendly, no-obligation call with our team. We'll listen to your ideas, answer your questions, and explore how we can help bring your project to life — tailored specifically to your needs.

We're here to help — no pressure, just honest advice.

Extensions

Browse just some of our portfolio of completed extension projects across the UK. Filter by extension type, property style, budget, and location to find inspiration for your project.

Hosannahs Change of Use and Remodelling Architectural Consultants - Side Return in London in London
Side Return£65k
London Terraced 12 sqm

Side Return in London

Side return infill creating open-plan kitchen dining space

View Case Study
Hosannahs Change of Use and Remodelling Architectural Consultants - Wraparound in Manchester in Manchester
Wraparound£68k
Manchester Semi-Detached 32 sqm

Wraparound in Manchester

Single storey wraparound extension with corner glazing and bifold doors

View Case Study
Hosannahs Change of Use and Remodelling Architectural Consultants - Loft Conversion in Birmingham in Birmingham
Loft Conversion£55k
Birmingham Terraced 28 sqm

Loft Conversion in Birmingham

Dormer loft conversion with en-suite bathroom

View Case Study
Hosannahs Change of Use and Remodelling Architectural Consultants - Rear Extension in Cardiff in Cardiff
Rear Extension£45k
Cardiff Terraced 20 sqm

Rear Extension in Cardiff

Single storey rear extension with bifold doors opening to garden

View Case Study

Customer Reviews

Homeowners trust us with their design projects.

Everything ran smoothly from consultation

"Satisfied client! Everything ran smoothly from consultation to the customer service to my plans being handed to me fast. Thanks so much."

Noah • Yell

Planning Applications

Hosannahs has been a star in handling our survey

"Hosannahs has been a star in handling our extension survey plan. We also used her to submit plan to council. They have been an excellent communicator and we felt very supported throughout and made some valuable suggestions. Highly recommended!"

Shahin • Nottingham

Extension Survey

Extremely pleased with the entire experience

"We've hired Hosannah's ltd to help us with the Planning Design Drawings for our extension and I am extremely pleased with the entire experience. It has exceeded our expectations. Very professional and prompt service throughout."

Keron • Birmingham

Extension Design

Professionalism and excellent communications

"The communications I did have with Hosannahs, very clearly demonstrated their professionalism and excellent communications in a timely and concise manner. I will most definitely use the services not only for the planning permission application but also for the detailed building drawings."

Claude • Dumbarton

Planning Permission

Very happy with the experience

"I am very happy with the experience with Hosannahs. I have more building projects and would come back to them."

Dave • Yell

Building Projects

Great work with our planning applications

"I just want to appreciate your great work with our planning applications, and the building regulations drawings. Everything was done professionally and their cost was way lower compared to other firms I checked who gave quotes that cost so much."

Sally • Yell

Planning & Building Regs

Everything ran smoothly from consultation

"Satisfied client! Everything ran smoothly from consultation to the customer service to my plans being handed to me fast. Thanks so much."

Noah • Yell

Planning Applications

Hosannahs has been a star in handling our survey

"Hosannahs has been a star in handling our extension survey plan. We also used her to submit plan to council. They have been an excellent communicator and we felt very supported throughout and made some valuable suggestions. Highly recommended!"

Shahin • Nottingham

Extension Survey

Extremely pleased with the entire experience

"We've hired Hosannah's ltd to help us with the Planning Design Drawings for our extension and I am extremely pleased with the entire experience. It has exceeded our expectations. Very professional and prompt service throughout."

Keron • Birmingham

Extension Design

Professionalism and excellent communications

"The communications I did have with Hosannahs, very clearly demonstrated their professionalism and excellent communications in a timely and concise manner. I will most definitely use the services not only for the planning permission application but also for the detailed building drawings."

Claude • Dumbarton

Planning Permission

Very happy with the experience

"I am very happy with the experience with Hosannahs. I have more building projects and would come back to them."

Dave • Yell

Building Projects

Great work with our planning applications

"I just want to appreciate your great work with our planning applications, and the building regulations drawings. Everything was done professionally and their cost was way lower compared to other firms I checked who gave quotes that cost so much."

Sally • Yell

Planning & Building Regs

Rated 5/5 on Google & Yell
Get In Touch

Start Your Project Today

Contact us for a free consultation and let's discuss your project.

Call Us

029 2115 0515

Mon-Fri 9am-6pm

Email Us

info@hosannahs.com

We reply within 24hrs

Request a Free Quote

500+ homeowners helped 98% planning approved

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