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  • Home
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Modern Rear Extension Plans (Online Architect) | MyHomePlans

Get Modern Rear Extension Drawings Online — Planning, Building Regs + 3D Visuals

Upload your existing plans, measurements, or photos, and MyHomePlans will utilize our online architectural services to design your modern rear extension remotely. This includes comprehensive planning drawings, building regulations drawings, and realistic 3D renders.  


✔ Fixed pricing  

✔ Fast turnaround  

✔ Nationwide & global service  

✔ No site visits required  


📧 Email: online@myhomeplans.co.uk  

📞 WhatsApp / Call: 07835 743338  


[Get an Instant Quote]

Get an Instant Quote

MyHomePlans - Innovative Architecture Solutions

Modern Rear Extension Project Overview

This project involved the complete transformation of a traditional semi-detached property through the design of a modern single-storey rear extension. The goal was to replace an outdated rear projection with a contemporary, open-plan living space that maximized natural light, improved connection to the garden, and significantly increased the home’s usability and value.


The project was delivered entirely through online architectural services by MyHomePlans, utilizing a combination of photorealistic 3D renders, planning drawings, and technical construction details to provide the client with total clarity before construction commenced.


Existing Property (Before)


Project Type: Single-Storey Rear Extension

Property Type: Semi-Detached House

Service: Full Online Architectural Design

Delivery: Nationwide | No site visits required

3D floor plan showing open-plan kitchen dining, lounge, utility and playroom by MyHomePlans.


Existing floor plan open-plan kitchen diner layout with lounge, utility and playroom by MyHomePlans.

Modern house with a sleek black and white extension and a spacious backyard.

MyHomePlans - Innovative Architecture Solutions

Designing Spaces for Life at MyHomePlans Architecture

At MyHomePlans Architecture, we believe that architecture and design can influence how we live, work, and play. Our team of architects and designers is dedicated to creating beautiful and functional spaces that meet the needs of our clients. We specialize in online architectural services, including residential, commercial, and institutional architecture. Our offerings range from planning drawings to construction documentation and project management, ensuring that every aspect, including rear extension design, is expertly handled.

Our Team

Our team of architects and designers are passionate about creating innovative and sustainable designs that improve the quality of life for people. They bring a wealth of experience and expertise to every project, ensuring that each design is tailored to meet the unique needs of our clients.

Portfolio

Modern Rear Extension Plans - MyHomePlans

Residential Design

Residential Design

Residential Design

Our online architectural services for residential design are tailored to your specific needs and preferences. Whether you are building a new home or remodeling an existing one, we will work with you to create a space that is both functional and beautiful, including detailed planning drawings and innovative rear extension design.

Commercial Design

Residential Design

Residential Design

We specialize in providing online architectural services that focus on designing commercial spaces that are both functional and visually appealing. From retail spaces to offices, we will work with you to create a space that meets your business needs and reflects your brand, including detailed planning drawings and innovative rear extension design.

Sustainable Design

Residential Design

Interior Design Services

We are committed to sustainable design practices that minimize the environmental impact of our projects. Through our online architectural services, we can assist you in creating planning drawings that incorporate eco-friendly solutions, including green roofs and solar panels, into your rear extension design.

Interior Design Services

3D Modeling and Visualization

Interior Design Services

Our interior design team will work with you to create a space that is both beautiful and functional. Utilizing our online architectural services, we will assist you in creating planning drawings for your project. From selecting materials to choosing furniture and decor, we will help you develop a rear extension design that reflects your style and meets your needs.

Project Management

3D Modeling and Visualization

3D Modeling and Visualization

Our project management team will ensure that your project is completed on time, within budget, and to your satisfaction, especially when it comes to our online architectural services. We will manage all aspects of the project, from scheduling to quality control, including the creation of planning drawings and the implementation of your rear extension design.

3D Modeling and Visualization

3D Modeling and Visualization

3D Modeling and Visualization

Our online architectural services, including 3D modeling and visualization, allow you to see your project in detail before construction begins. This helps ensure that the planning drawings meet your expectations and allows for any necessary changes, such as those related to rear extension design, to be made before construction starts.

"The 3D renders made everything clear from the start. We knew exactly what we were building, planning went through smoothly, and our builder had no questions. MyHomePlans made the process stress-free.”


What Our Clients Said

existing property description and client brief

Existing House Layout (Before the Rear Extension)

Existing House Layout (Before the Rear Extension)

Existing House Layout (Before the Rear Extension)

The existing property featured a small, dated rear projection that no longer met the needs of modern family living. To enhance the space, online architectural services could be utilized to create effective planning drawings for a rear extension design. The internal layout was restrictive, with limited daylight entering the rear of the house and poor visual connection to the garden.

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Key Limitations of the Existing Layout:

Existing House Layout (Before the Rear Extension)

Existing House Layout (Before the Rear Extension)

The small, enclosed kitchen space suffered from limited natural light and a poor flow between rooms, creating a weak connection to the outdoor area. Additionally, the rear elevation had a dated appearance. While structurally sound, the rear of the house was underperforming both functionally and aesthetically. By utilizing online architectural services for planning drawings, a new rear extension design could significantly enhance the overall look and functionality of this space.

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Client Brief for a Modern Rear Extension

Existing House Layout (Before the Rear Extension)

Client Brief for a Modern Rear Extension

The client approached MyHomePlans with a clear and practical brief: Create a large open-plan kitchen, dining, and living space, and implement a rear extension design to replace the existing rear projection. They requested the introduction of large areas of glazing to improve daylight and garden access, while achieving a modern architectural look. Additionally, the client sought online architectural services that would keep the design planning-friendly, allowing them to fully understand the planning drawings before building. Above all, they wanted certainty — visually, technically, and financially, while avoiding traditional architect fees and site visits.

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Rear Extension Planning & Technical Challenge

Potential Issues Identified

Our Planning-Friendly Rear Extension Design Solutions

Our Planning-Friendly Rear Extension Design Solutions

An early feasibility review of rear extension design for semi-detached homes highlighted several common challenges. Utilizing online architectural services can help navigate these issues effectively. 


1. Planning & Neighbour Amenity  

   - Risk of objections relating to loss of light  

   - Concerns over overdevelopment  

   - Visual impact on neighbouring properties  


2. Structural Constraints  

   - Removal of a load-bearing rear wall  

   - Integration with an older building structure  


3. Drainage & Services  

   - Existing drainage runs within the extension footprint  

   - Need to maintain access to inspection chambers  


4. Overheating Risk  

   - Large glazing areas increasing solar gain  

   - Risk of poor summer comfort if not designed correctly with appropriate planning drawings.

Our Planning-Friendly Rear Extension Design Solutions

Our Planning-Friendly Rear Extension Design Solutions

Our Planning-Friendly Rear Extension Design Solutions

Every issue was addressed before design sign-off, reducing risk during planning and construction. Our online architectural services ensure that all aspects are carefully considered from the start.


Planning-Led Design


- Extension depth and height kept within acceptable limits.

- Roof profile designed to minimize overshadowing.

- Glazing aligned with existing openings.

- Clear, professional planning drawings produced to guide the project.


Structural Clarity


- Beam positions clearly coordinated.

- Structural openings sized correctly from the outset.

- Builder-friendly detailing included to streamline the construction process.


Drainage Strategy


- Drainage routes identified early in the design phase.

- Rerouting solutions shown on drawings for clarity.

- Access points retained externally to maintain functionality.


Environmental Performance


- Solar control glazing specified to enhance energy efficiency.

- Roof overhang used to reduce summer overheating.

- Opening rooflights included for purge ventilation, contributing to a comfortable indoor environment.

Proposed Modern Flat Roof Rear Extension Design

Our Planning-Friendly Rear Extension Design Solutions

Proposed Modern Flat Roof Rear Extension Design

MyHomePlans proposed a clean, contemporary rear extension design that clearly distinguishes between old and new while remaining sympathetic to the original house.


Design Features:


- Single-storey flat roof extension

- Large aluminium sliding doors

- Brick and light render external finish

- Open-plan kitchen, dining, and living space

- Strong indoor-outdoor connection


The design was intentionally simple, elegant, and practical — reducing build complexity while maximizing impact.


As part of their online architectural services, MyHomePlans provided comprehensive planning drawings once the design was approved, producing a full set of professional documents.


Included:


- Existing & proposed plans

- Existing & proposed elevations

- Planning submission drawings

- Building Regulations drawings

- Construction sections and details


This thorough approach ensured the project moved smoothly from design to planning to construction without redesign or delays.

Frequently Asked Questions

Please reach us at online@myhomeplans.co.uk if you cannot find an answer to your question.

No — MyHomePlans is a fully online architectural service. We work from your photos, measurements, existing plans (if available), and satellite mapping to produce accurate drawings remotely. 


No architect can guarantee planning approval, but we design with planning policy and neighbour impact in mind. We provide professional planning drawings to support a smooth submission process. 


Many modern rear extensions can be built under Permitted Development, depending on size, location and property type. We can assess your project and advise if a Lawful Development Certificate is recommended. 


Yes — MyHomePlans provides rear extension plans across the UK and worldwide, with a simple online process and fast turnaround. 


Typically you’ll need existing and proposed floor plans, elevations and a location/block plan. We provide a complete planning drawing package. 


Yes — most rear extensions require building regulations approval. We provide technical drawings and construction details suitable for Building Control and your builder. 


Most projects are turned around quickly depending on complexity. We confirm timescales at the quote stage and can prioritise urgent projects. 


Yes — we can produce 3D visuals to help you understand the design clearly before you start construction. 


proposed scheme by MyHomePlans

Modern house extension with large glass sliding doors and a spacious kitchen.

Rear Extension Outcome & Estimated Costs

The final proposal delivered includes: 


- A modern, light-filled open-plan living space 

- A strong visual upgrade to the rear of the property, enhanced through our innovative rear extension design 

- Improved functionality for everyday family life, made possible by our comprehensive online architectural services 

- Clear, build-ready planning drawings that facilitate the construction process 

- A stress-free design and planning process that ensures your vision is realized smoothly. 


Estimated Results: 


Estimated Build Cost: £65,000 – £85,000 


MyHomePlans Design Fee: £1,250 – £1,500 


Estimated Value Increase: £40,000 – £60,000


About MyHomePlans

MyHomePlans is a global online architectural design service, delivering professional planning drawings, permitted development assessments, Lawful Development Certificate applications, and building regulations packages — all handled remotely.


Website Disclaimer

The information provided on this website is for general guidance only and does not constitute legal or planning advice.

Planning regulations, development rights, and building requirements vary by location and may change over time. Clients are advised to confirm requirements with the relevant local authority or regulatory body.

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