
Design, Planning & Build for Bayford Properties
A well-designed extension can transform how you use your Bayford home. We have years of experience delivering projects in this area, working closely with Hertfordshire County Council to navigate planning requirements and ensure every build meets current regulations.
Our experience in Bayford covers the full spectrum of residential extensions — from modest single storey additions to ambitious whole-house remodels. We treat every project in the East Hertfordshire area with the same level of care, detail, and professionalism.

A recent extension project in the East Hertfordshire area
Our team works regularly in Bayford and across East Hertfordshire, giving us first-hand knowledge of the local planning climate. We understand what Hertfordshire County Council officers look for in an application and tailor our submissions accordingly, which helps reduce the risk of delays or refusals.
This local experience also means we can advise you on realistic timelines and costs specific to the Bayford area, rather than generic estimates that may not reflect conditions on the ground.
Navigating planning rules in Bayford does not have to be complicated. We start by reviewing your property against current permitted development criteria. If your extension qualifies, we can proceed to building control drawings without the delay of a planning application.
For projects that do need planning consent, we prepare a thorough submission for Hertfordshire County Council that anticipates potential concerns — from overshadowing and privacy to design impact. Our track record of successful approvals gives you confidence that the process is in capable hands.
Bayford has a diverse housing stock and we have experience extending all property types in the area. Our architects adapt designs to suit the character and structure of each home, whether that means matching original brickwork on a period property or creating a contemporary contrast on a more modern home.
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Covering SG13 & surrounding postcodes
Guide prices for house extensions in the East Hertfordshire area. Every project is different — we provide a detailed, itemised quote after a free site visit.
| Extension Type | Typical Cost |
|---|---|
| Single Storey Rear Extension | £30k – £60k |
| Double Storey Extension | £47k – £102k |
| Side Return Extension | £21k – £43k |
| Wrap-Around Extension | £51k – £111k |
| Loft Conversion (Dormer) | £34k – £55k |
| Kitchen Extension | £26k – £51k |
| Basement Conversion | £68k – £170k |
| Garage Conversion | £13k – £26k |
Prices are guide figures for 2026 based on projects in the Hertfordshire area. PD = Permitted Development (no formal planning application needed in most cases). Actual costs depend on specification, site conditions, and scope.

Professional single storey extension design and planning for ground floor expansions
Typical: 6-12 weeks
Two-storey home extension design maximizing space and value
Typical: 8-16 weeks
Garden-facing extensions creating seamless indoor-outdoor living
Typical: 6-10 weeks
Narrow extensions utilizing side garden space efficiently
Typical: 6-12 weeks
Specialized kitchen and dining space extensions for modern living
Typical: 8-14 weeks
Converting attic space into valuable living areas
Typical: 6-10 weeks
Underground extensions creating additional living space
Typical: 12-20 weeks
Expert guidance through planning applications and permitted development
Typical: 8-16 weeks
Comprehensive extensions combining rear and side elements for maximum space
Typical: 10-18 weeks
Comprehensive whole-house renovation and modernization services
Typical: 12-24 weeks
Expert structural engineering services including underpinning and load-bearing work
Typical: 8-16 weeks
Converting garages into functional living spaces for bedrooms, offices, and studios
Typical: 4-8 weeksFrom the first phone call to moving into your new space — here is what to expect at every stage.
We visit your Bayford property, discuss your vision, assess feasibility, and give you honest guidance on costs and planning routes.
Our architects create detailed plans, 3D visuals, and construction drawings tailored to your Bayford home and how you want to live in it.
We prepare and submit your planning application, liaise with the local authority covering Bayford, and handle building regulations documentation.
Our vetted builders bring the design to life. We oversee the build, conduct regular site visits, and manage quality at every stage.
Final inspections, building control sign-off, snagging checks, and handover — your new Bayford space is ready to enjoy.
We design all types of extensions for Bayford homes: single storey rear extensions that open onto the garden, double storey extensions for growing families, side return extensions that reclaim wasted space, wrap-around extensions for maximum impact, loft conversions that add bedrooms and value, kitchen extensions with open-plan living, and basement conversions where ground conditions allow.
Every design is developed around your property's specific structure, orientation, and the character of the East Hertfordshire streetscape. We use 3D visualisation so you can see exactly how the finished extension will look and feel before any work begins on site.
Navigating planning rules in Bayford does not have to be complicated. We start by reviewing your property against current permitted development criteria. If your extension qualifies, we can proceed to building control drawings without the delay of a planning application.
For projects that do need planning consent, we prepare a thorough submission for Hertfordshire County Council that anticipates potential concerns — from overshadowing and privacy to design impact. Our track record of successful approvals gives you confidence that the process is in capable hands.

Extension completed in the East Hertfordshire area
Our building regulations packages for Bayford projects go beyond the minimum requirements. We specify high-performance insulation, efficient heating layouts, and robust structural details that deliver a comfortable, energy-efficient space for years to come.
We work with approved inspectors and local authority building control to ensure your project passes every stage check first time. If issues arise on site, we respond quickly with amended details to keep the build on programme.
We are not a generic design factory — we are a specialist team that focuses on house extensions in Bayford and the wider East Hertfordshire area. That focus means deeper local knowledge, better planning outcomes, and more practical designs that actually work within real-world budgets and site constraints.
Every project gets a dedicated lead who stays with you from the first consultation to final handover. We are transparent on fees, realistic on timelines, and always available when you need us.

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Ready to discuss your Bayford house extension project? Book a free, no-obligation consultation with our experienced team. We will visit your property, carry out a thorough assessment of the available options, and provide clear, detailed guidance on costs, timelines, planning requirements, and the best route to approval. Whether you are considering a single storey rear extension, a loft conversion, or a full refurbishment, our Bayford specialists are here to help. Call us today on 020 3051 9430 or request a callback online to get started.
Discover our comprehensive range of house extension solutions in London and surrounding areas
Professional single storey extension design and planning for ground floor expansions
Two-storey home extension design maximizing space and value
Garden-facing extensions creating seamless indoor-outdoor living
Narrow extensions utilizing side garden space efficiently
Specialized kitchen and dining space extensions for modern living
Converting attic space into valuable living areas
Call now to speak with our expert team. Get instant responses and professional guidance for your extension project.