House Extensions

Extensions Built on Design Excellence & Structural Certainty.

Dreaming of a spacious new kitchen, extra bedrooms, or a sun-filled living area? The journey to a perfect house extension can feel daunting, with worries about planning permission, structural challenges, and budget control.

We guarantee your house extension is not just beautifully designed but also structurally sound, compliant, and cost-effective, providing absolute clarity for your investment in Edinburgh, Fife or Lothians.

What Makes Us Different

Our Unique House Extension Advantage

We're Architectural and Structural Engineers

Design and structure integrated from day one.
This unique integration ensures your house extension is structurally robust and fully compliant from the very first sketch. By housing both disciplines in one firm, you gain absolute structural certainty while saving the significant expense and hassle of hiring two separate professionals.

Built-In Affordability

Designs are instantly buildable and budget-aware.
Our integrated approach means our plans consider buildability and cost efficiency at every stage. We design your home extension with construction in mind, providing better overall value and avoiding expensive redesigns down the line.

Unbiased Local Advice

We only commit to projects we believe will pass.
We guarantee unbiased advice. Following an in-depth survey, if your house extension project is unlikely to gain planning permission in Edinburgh, Fife or the Lothians, we will tell you honestly. We value clarity and commitment over profit.

House Extensions

Unlock Your Home's Full Potential.

A house extension is more than just adding space; it's an investment in your lifestyle, comfort, and future. Here's how you'll benefit from a home extension with Architectural Services Scotland :

Significantly Increase Your Property Value (ROI)

Adding desirable features like an open-plan kitchen-diner, an extra bedroom, or a dedicated home office can dramatically boost your home's market value. Our integrated architectural and engineering approach ensures your extension is fully compliant with all Planning Permission and Building Warrant approvals, guaranteeing its value is maximised and recognised by future buyers.

Tailor Your Home to Your Evolving Lifestyle

Your family's needs change over time. An extension allows you to bespoke-design a space that perfectly suits your current lifestyle-whether it's room for a growing family, a dedicated area for hobbies, or improving the flow for entertaining. We focus on crafting intelligent designs that integrate seamlessly, making your home truly work for you.

Enhance Natural Light & Indoor-Outdoor Living

Modern extensions are designed to flood your home with natural light, often incorporating large bi-fold doors, skylights, and expansive windows. This not only creates a more vibrant and inviting atmosphere but also strengthens the connection between your indoor living spaces and your garden, enhancing both daily enjoyment and entertaining possibilities.

Architectural Services Scotland - House Extension - Open Plan Kitchen Extension with Skylight

House extension with open plan kitchen
Skylight installed to increase natural light

Design for Every Ambition.

Whether you're looking for a subtle addition or a dramatic transformation, we design and manage a wide range of house extensions tailored to your property and lifestyle across Edinburgh, Fife and the Lothians. Our goal is always to create a space that feels integral to your home, maximises natural light, and adds significant value.

Single storey house extension
See this project in Fife

Architectural Services Scotland - House Extension Edinburgh - Modern Family Living

Single & Double-Storey House Extensions

Adding an entirely new room or expanding existing ones, either on a single level or vertically across two floors.

Ideal for adding extra bedrooms, a new master suite, or simply enlarging your ground floor footprint for a bigger living space. Our dual expertise ensures vertical expansions are structurally sound and seamlessly integrated.

Kitchen & Open-Plan House Extensions

Transforming a cramped kitchen into a spacious, light-filled open-plan kitchen-diner or family room.

Create the modern hub of your home. We excel at designing fluid spaces that enhance social interaction, often incorporating large glazing and bi-fold doors for an indoor-outdoor connection.

Open plan extension
See this project

Architectural Services Scotland - House Extension Edinburgh - Kitchen and Open Plan

Wrap around house extension
Skylights and French Windows

Modern wrap-around house extension on a traditional Scottish stone villa.

Wrap-Around House Extensions

Extending both to the side and the rear of your property simultaneously.

This maximises available space, creating expansive new areas. Our integrated approach is particularly valuable here, ensuring complex structural connections and multiple planning considerations are handled efficiently from concept to completion.

Side Extensions

Utilising unused side access or narrow plots to add valuable width to your property.

Perfect for creating a new utility room, a study, or widening existing rooms without encroaching on garden space. Our architectural and engineering team ensures even compact side extensions are practical, compliant, and aesthetically pleasing.

Side extension
Perfect for a Utility Room

Architectural Services Scotland - House Extension Edinburgh - Side Extension

Showcase Project

Bungalow Reimagined
From neglected bungalow to a premium, contemporary home.

This extensive renovation and extension transformed a run-down property into a high-value residence. Our integrated Architectural and Structural expertise designed a spacious, light-filled extension with bi-fold doors and a skylight, completely modernising the living space, kitchen, and bathroom. A true testament to bold vision and expert execution.

Architectural Services Scotland - Garage Conversion to Garden Flat - Construction
Architectural Services Scotland - Garage Conversion to Garden Flat - Construction
Architectural Services Scotland - Garage Conversion to Garden Flat - 2nd Bedroom
Architectural Services Scotland - Garage Conversion to Garden Flat - Bathroom
Architectural Services Scotland - Garage Conversion to Garden Flat - Kitchen
Architectural Services Scotland - Garage Conversion to Garden Flat - Living Area
Architectural Services Scotland - Garage Conversion to Garden Flat - Main Bedroom
Architectural Services Scotland - Garage Conversion to Garden Flat - Outside View

F.A.Q.

Do I need Planning Permission and a Building Warrant for a house extension in Scotland?

Yes, almost always. In Scotland, nearly all house extensions require Planning Permission from your local council (e.g., Fife Council, West Lothian Council). This assesses design, impact on neighbours, and local policy. Separately, a Building Warrant is mandatory, focusing on structural safety, energy efficiency, and fire regulations, ensuring the extension is built to strict Scottish Building Standards. Our integrated team manages both applications efficiently.

How much does a house extension typically cost, and how can I budget effectively?

The cost of a house extension in the Fife and Lothians region varies significantly based on size, complexity, and finishes, typically ranging from £2,000 to £3,000+ per square metre. The best way to budget effectively is through a Feasibility Study at the earliest stage. As both Architectural and Structural Engineers, we provide integrated design and structural costs upfront, identifying potential challenges (like complex foundations) to give you an accurate, unbiased budget from day one.

How long does the entire process for a house extension take?

From initial design to final construction, a house extension typically takes 6 to 18 months. This timeline includes:

  • Design & Planning: 3-6 months (includes design, structural calculations, Planning Permission, and Building Warrant submissions).
  • Construction: 3-12 months (actual build time on site). Our combined architectural and engineering expertise streamlines the design and approvals phase, reducing the common delays associated with coordinating separate consultants.
How do you ensure the extension integrates seamlessly with my existing home?

This is a core aspect of our architectural design quality. We meticulously assess your home's existing style, materials, and internal flow. Our designs focus on maximising natural light, creating fluid connections between old and new spaces, and specifying finishes that complement your property. The goal is to make the extension feel like it was always part of the original design, enhancing both aesthetics and functionality.

What unique advantage do you offer for complex extension projects?

Our primary unique advantage is being Architectural AND Structural Engineers. For complex extensions, this means:

  1. Guaranteed Feasibility: We confirm structural viability and address potential issues before detailed design.
  2. Streamlined Approvals: Integrated designs meet both planning and Building Warrant requirements seamlessly.
  3. Budget Certainty: No unexpected structural costs, as these are assessed upfront. This combined expertise provides unparalleled clarity and confidence for your significant investment.

3 Steps to Success - From Concept to Confidence

Your House Extension Journey

1.

Vision & Feasibility - An Unbiased Assessment

We start by understanding your ambitions and assessing your property's potential. Our integrated Architect and Structural Engineer team conducts a thorough site visit, discussing design possibilities, structural implications, and local planning constraints. We then provide an unbiased proposal, ensuring your vision is buildable and affordable from day one.

2.

Integrated Design, Planning & Warrants

Once feasible, we develop comprehensive architectural plans, incorporating detailed structural calculations. We manage all necessary submissions, securing both Planning Permission (where required) and the crucial Building Warrant approvals with local authorities (Fife, Lothians). This seamless approach minimises delays and stress.

3.

Overseeing Construction to Your Satisfaction

We offer flexible support throughout the construction phase. Our team can provide site supervision, answer technical queries, and conduct quality checks to ensure the build aligns perfectly with the approved plans and Building Warrant specifications. We work to deliver a finished extension that exceeds your expectations.

Our Clients Say It Best

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Stuart Harden profile picture
Stuart Harden
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We had to get drawings done for a building warrant during the sale of our house. Darren, with assistance from his team, worked with us and the Council to get the required documents passed by the Council. It was all carried out in a very professional manner, with Darren keeping me up to date with the progress. I would highly recommend this company!!
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Adam Bawol profile picture
Adam Bawol
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Really happy with the garage conversion – the whole process was smooth and professional from start to finish. Darren and the team were great to work with, always helpful and responsive. Would definitely recommend!
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Kris Boyd profile picture
Kris Boyd
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Darren and the team successfully took us through the Building Warrant Application process for our garage conversion. From the first email, to the site visit, to drawing up the plans and submitting the application, every step was explained and carried out in a friendly and professional way. Great service.
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Chris profile picture
Chris
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Very smooth process with Darren and team. We were unsure of what exactly we wanted and Darren was able to talk through numerous options with us, helping us land on a final plan. Darren was there to support throughout the build as needed and everything concluded without issue. Very happy with the end result.
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alan wilson profile picture
alan wilson
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Fantastic service from start to finish. Supported close out of Building Warrant for property extension and liaised with planning department to close out outstanding issues to achieve building completion certificate
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Helen Farquhar profile picture
Helen Farquhar
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First class excellent service from the team. From initial thought and ideas to the completion of all building drawings, the service has been amazing. With planning approval and building warrant granted we are now ready to move onto the next stage. Thanks to you all.
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Murray Hogg profile picture
Murray Hogg
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Darren and the team produced the drawings to obtain our building warrant without any hassle. They were a pleasure to work with and can't fault in any way.
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Jan Nowak profile picture
Jan Nowak
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I was advised by a building contractor to contact Architectural Services Scotland to prepare drawings for a home development project. This advice turned out to be excellent. After an initial telephone conversation, followed by a site visit for detailed measurements, and the discussion of a couple of technical problems, an initial set of drawings was produced. A small number of changes were agreed via telephone and the finalised drawings were produced the next day. The plans were submitted to the Council by the company on my behalf and planning permission was approved without any difficulty. Throughout the process the three team members I spoke to were helpful and friendly. Costs were clearly explained at the outset and were accurate (no hidden extras.) I would recommend Architectural Services Scotland without reservation to anyone about to undertake a building project and would be delighted to work with the team again. Jan Nowak
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Paul O profile picture
Paul O
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Best architect and planning permission experts I’ve ever worked with. Highly recommend!
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Detlef Lorenz
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Services delivered as agreed and within agreed time scales. Happy to recommend Darren and his company.
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Ready to Unlock Your Home’s Potential?

Don't let unused space remain a source of uncertainty. Take the first step toward a beautiful, value-adding house extension with a team that guarantees clarity. We'll assess your project's feasibility, structure, and budget with unbiased, expert advice.

Take the First Step

Where Innovative Design Meets Purpose

Our House Extension Projects

See how our integrated architectural design and structural engineering brings clarity to your project.

Start Your Project with Absolute Certainty

Don’t risk your investment on guesswork. Our integrated Feasibility Study provides a professional roadmap for your project, ensuring your vision is both buildable and affordable. What we provide during your study:

  • Preliminary Drawings: We provide initial design sketches to help you visualise your layout and explore different floor plan options.
  • Structural Assessment: We identify load-bearing requirements and technical constraints early.
  • Planning & Compliance Review: A clear strategy for securing Planning Permission and Building Warrants in Fife and the Lothians.
  • Fixed-Price Quote: A transparent project fee with no hidden costs.
  • Expert Advice: Direct access to a team that is both Architecturally and Structurally qualified.

Fill out the form below, and our team will contact you within one business day to schedule your site visit. Cost From : £80