Unlock Your Home's Potential in Port Seton

Give your cat the roaming space it deserves. (And maybe build a nice kitchen for yourself too). The best pet-friendly extensions in Port Seton.

Get Your Free Quote

Specialists in Port Seton House Extensions

From compact side returns in terraced homes to large wrap‑around extensions in suburban properties, we design and build Port Seton house extensions that enhance space, flow and value.

We manage everything: design, planning, building regulations, groundworks, structure, and high‑quality internal finishes—delivered on time and to budget by our CITB certified team.

  • Single-storey and double-storey extensions
  • Wrap-around and side-return extensions
  • Kitchen and dining extensions
  • Conservatories & orangeries
  • Planning permission & building regs
  • Full project management
Port Seton house extension services

Our House Extension Process in Port Seton

A clear, step‑by‑step process from first enquiry to final handover so you always know what is happening on your Port Seton project.

1. Initial Consultation & Site Survey

We visit your property in Port Seton to understand how you live, your space requirements, budget and timescales. We discuss options such as single‑storey, double‑storey or wrap‑around extensions.

2. Design, Planning & Costing

Working with architects and structural engineers, we develop extension drawings, prepare planning or permitted development documentation and provide a detailed, fixed price for the build.

3. Construction Phase

Our build team manages all aspects of construction – groundworks, drainage, structure, roof, windows, electrics, plumbing, plastering and finishes – with regular updates and site meetings.

4. Handover, Snagging & Aftercare

Once complete, we walk through your new space, deal with any snags promptly and provide certificates, warranties and building control sign‑off for your Port Seton house extension.

Types of Extensions We Build

Choose the right extension for your Port Seton home and lifestyle

Single storey house extension in Port Seton

Single-Storey Extensions

Perfect for expanding ground floor living spaces. Ideal for kitchen extensions, dining areas, or family rooms with seamless indoor-outdoor flow.

  • Kitchen extensions
  • Family room additions
  • Bi-fold doors to garden
  • Open-plan living
Double storey house extension in Port Seton

Double-Storey Extensions

Maximize space with two-storey additions. Add bedrooms, bathrooms, and living areas while maintaining garden space and adding significant value.

  • Extra bedrooms
  • Additional bathrooms
  • Expanded living areas
  • Maximum value addition
Wrap around house extension in Port Seton

Wrap-Around Extensions

Combine side return and rear extensions for maximum space transformation. Create spectacular open-plan living areas with abundant natural light.

  • Maximum space gain
  • Open-plan design
  • Natural light optimization
  • Complete transformation
Modern kitchen extension in Port Seton

Kitchen Extensions

Transform your kitchen into the heart of your home. Modern kitchen extensions with island units, dining areas, and seamless garden access.

  • Modern kitchen design
  • Island and peninsula units
  • Dining integration
  • Garden connectivity
Conservatory and orangery extension in Port Seton

Conservatories & Orangeries

Light-filled extensions that blur the boundary between indoor and outdoor living. Modern glazed extensions with excellent thermal performance.

  • Maximum natural light
  • Garden views
  • Year-round usability
  • Thermal efficiency
Loft extension with dormer in Port Seton

Loft Extensions

Convert unused loft space into bedrooms, offices, or playrooms. Dormer extensions and full loft conversions with modern amenities.

  • Additional bedrooms
  • Home office space
  • En-suite bathrooms
  • Dormer windows

Why Choose Building Group for House Extensions in Port Seton?

A specialist house extension contractor trusted across Port Seton and the wider East Lothian area for quality, safety and clear communication.

CITB Trained & Experienced Team

All trades on your Port Seton house extension are vetted, experienced and follow CITB and UK building regulations. Structural work, foundations, steels and roof alterations are all signed off by qualified professionals.

Fixed, Itemised Quotations

We provide clear, itemised quotes for your extension project in Port Seton – including labour, materials and allowances – so you know exactly what’s included before work begins.

Fully Insured & Guaranteed

Building Group carries full public liability and employers’ liability insurance. All major elements of your house extension are covered by written workmanship guarantees and manufacturer warranties.

Design, Planning & Building Control

From initial concept sketches to planning permission and building control sign‑off, we manage the full process for your Port Seton extension so you only deal with one contractor.

Why Choose Our Port Seton House Extensions

Increase Property Value

Well-designed extensions can add 15-25% to your property value, often exceeding construction cost and providing excellent ROI.

Avoid Moving Costs

Extend your current home instead of moving. Save on estate agent fees, stamp duty, legal costs, and the stress of relocating.

Better Family Living

Create the space your family needs to grow and thrive—open-plan living, additional bedrooms, and functional family areas.

Personalized Design

Custom layouts, premium materials, and finishes that reflect your style and needs—designed for Port Seton homes.

House Extensions Near Me in Port Seton

Looking for trusted house extension builders in Port Seton and across East Lothian? Our local team delivers high–quality extensions with full project management.

Local Port Seton & East Lothian Expertise

Because we work across Port Seton and the wider East Lothian area, we understand local planning policies, typical property types and what adds real value in this market.

  • Local survey and design support in Port Seton
  • Planning and building control handled with your East Lothian council
  • Extensions designed specifically for Port Seton homes and plots
  • CITB certified trades and fully insured work

You can also browse all of our coverage areas on our House Extensions Near Me hub to see other locations we serve around East Lothian.

Where We Work Around Port Seton

We cover Port Seton and surrounding East Lothian locations, typically within a 30–40 minute drive. This keeps our teams local and our response times quick.

  • Full design & build extensions
  • Structural steel & open‑plan knock‑throughs
  • Kitchen, bathroom and utility refits
  • Planning, building regs and inspections

Our Extension Process

From initial consultation to final handover—complete delivery in Port Seton

Planning & Design Phase

  • Initial Consultation: Free site visit to assess your property and discuss your extension goals
  • Design Development: Architectural drawings and 3D visuals tailored to your home
  • Planning Permission: Full application service including drawings and submission
  • Building Regulations: Technical drawings and building control approvals
  • Detailed Quote: Transparent pricing with full material and labour breakdown

Construction Phase

  • Project Management: Dedicated PM coordinating all trades and timelines
  • Professional Trades: CITB certified builders, electricians, plumbers and specialists
  • Quality Control: Regular inspections and quality checks throughout
  • Progress Updates: Weekly reports with photos and timeline updates
  • Final Handover: Warranties, certificates and maintenance guides

Design & Planning

Professional architectural services

Planning Permission

Full application and approval service

Expert Construction

CITB certified professional trades

Port Seton & East Lothian Coverage

House Extensions Across the Region

Our extension teams operate across Port Seton and neighbouring areas, bringing local knowledge and expertise to every project.

We provide comprehensive house extension services throughout Port Seton and the wider East Lothian area, including Port Seton, surrounding East Lothian villages and suburbs.

Our local Port Seton team understands the specific planning requirements, building regulations, and architectural styles common to properties in this area. We work closely with East Lothian planning departments to ensure smooth project approval.

Whether you're in Port Seton town centre or the surrounding suburbs, we deliver the same high standards of craftsmanship and project management that have made us the region's trusted extension specialists.

Port Seton and East Lothian extension service coverage

Port Seton House Extension Reviews

Recent feedback from homeowners in Port Seton and across East Lothian.

★★★★★

“The team did a fantastic job on our side return extension. They navigated the planning process in Port Seton effortlessly.”

David L – Port Seton
★★★★★

“Honest advice and quality workmanship. Our extension in Port Seton was completed within budget and looks amazing.”

John P – East Lothian
★★★★★

“Our kitchen–diner extension in Port Seton has totally changed how we use the house. The team kept everything tidy and on schedule.”

Sarah J – Port Seton
★★★★★

“Building Group transformed our home in East Lothian. The new space is exactly what we wanted. Highly recommended.”

The Clarke Family – Port Seton

Read more detailed feedback from our house extension clients.

See All Reviews

Recent House Extension Projects Near Port Seton

A selection of recent house extensions we have completed across East Lothian, including projects close to Port Seton.

Kitchen Extension & Open‑Plan Living

Single‑storey rear extension with structural steel installation, new kitchen, rooflights and bi‑fold doors to create a modern, open‑plan family space for a home near Port Seton.

Double‑Storey Side Extension

Two‑storey side extension providing an additional bedroom, en‑suite and extended ground floor living area for a property in the wider East Lothian area.

Wrap‑Around Extension

Full L‑shaped wrap‑around house extension with new utility, WC, kitchen‑diner and upgraded facade, designed to maximise the plot and add long‑term value.

View more of our house extension projects

Port Seton House Extension FAQs

Clear answers to the most common questions homeowners in Port Seton and East Lothian ask us about planning, costs and timelines for house extensions.

Not always. Many single-storey rear extensions in Port Seton can be built under permitted development, which means you don’t need a full planning application. However, this depends on:

  • The overall depth and height of the extension
  • Whether your home has already been extended in the past
  • If the property is terraced, semi-detached or detached
  • Whether you live in a conservation area or have an Article 4 direction

Before any design is finalised, we check the latest East Lothian council guidance, measure your existing property and confirm whether your project is permitted development or needs a planning application. If an application is required, we handle drawings, submission and liaison with the planning officer for you.

Costs vary depending on size, specification and access, but as a guide for Port Seton and the wider East Lothian area:

  • Single-storey extensions typically start from around £1,500–£2,500 per m²
  • Double-storey extensions usually range from £1,800–£3,000 per m²
  • High-end finishes, glazing walls or complex steelwork will increase the budget

We always carry out a detailed survey and provide a fixed, itemised quotation so you can see exactly what is included: groundworks, structure, roof, windows/doors, internal finishes and professional fees where required. Value engineering options can be discussed if you have a strict budget to work to.

A typical single-storey extension in Port Seton takes around 8–12 weeks on site, while larger or double-storey projects can take 12–16+ weeks. The programme usually follows these stages:

  • Groundworks and foundations
  • Walls, steelwork and structural alterations
  • Roof structure and covering
  • Windows, doors and making the extension watertight
  • First fix services (electrics, plumbing, heating)
  • Plastering, second fix and finishes

Before we start on site, you’ll receive a clear project programme with key milestones so you always know what is happening and when each phase is due to be completed.

In most projects, yes. Many clients in Port Seton stay in their homes throughout the build. We plan the works so that:

  • Dust and debris are controlled with temporary screens and protection
  • Safe access routes are maintained at all times
  • Noisy or disruptive works are grouped together where possible
  • Kitchen and bathroom facilities remain usable for as long as we can

If a short period of alternative accommodation is advisable (for example during major knock-through works), we will explain this during the planning stage so you can factor it into your arrangements.

In most cases, a well-designed extension in Port Seton adds significant value as well as improving day-to-day living. Estate agents in East Lothian typically see the best returns from:

  • Creating larger open-plan kitchen / family spaces
  • Adding extra bedrooms and a bathroom on upper floors
  • Improving natural light with good glazing and layout

We can work with you to balance build cost against likely value uplift, so your project makes sense both as a home improvement and as an investment.

Based locally in East Lothian, serving homeowners in and around Port Seton. Typical project radius: ~25–30 miles from Port Seton.

Ready to Extend Your Port Seton Home?

Get your free, no-obligation quote for professional house extension services

Get Free Quote Today