Do I Need an Architect for a House Extension?

If you’re thinking about extending your home, one of the first questions you’re likely to ask is: do I actually need an architect?

The short answer is not always — but having an architect involved can make a significant difference to the design, planning process and ultimately the success of your project.

For a straightforward extension, there are several different ways you can approach the design and construction. However, an experienced residential architect can help you understand what is possible, develop the right design for your home and make sure the project works both practically and aesthetically.

At LA Hally Architect, we work with homeowners across Winchester, Hampshire and the surrounding areas on everything from smaller home extensions to substantial renovations and alterations to existing properties.

Do I legally need an architect to build an extension?

No. In England, you are not generally required to appoint an architect simply because you want to extend your home.

Depending on the nature of the project, you may be able to work with a building designer, architectural technologist, structural engineer or contractor instead — and some homeowners choose to prepare elements of the project themselves.

However, this doesn’t necessarily mean that an architect isn’t worthwhile.

An extension is more than simply adding some extra floor area to your house. The success of the project depends on how the new space connects with the existing building, how it affects natural light and views, how it sits within the garden and how it responds to the character of the property and its surroundings.

This is where professional design experience can add real value.

What can an architect do for a house extension?

An architect can be involved at whatever level you need.

At LA Hally Architect, we start by understanding the existing property and, most importantly, how you want to live in it.

Our initial discussions cover your aspirations, budget and timescales, as well as the things that currently work — or don’t work — about your home. We also look at the site and its surroundings, considering things such as views, privacy, daylight and how the proposed extension could interact with the garden.

From there, the design develops collaboratively with the homeowner.

1. Developing the right design

It can be tempting to start with a simple idea such as:

“We’d like a bigger kitchen.”

But once you start looking at the possibilities, there may be several ways of achieving it.

Could the extension create a better connection with the garden? Could moving the kitchen improve the whole ground-floor layout? Could an alteration to the existing house make the new space feel considerably larger? Could carefully positioned windows bring in more natural light?

At LA Hally Architect, we develop a detailed brief before exploring design options, using sketches, 2D drawings and 3D models to help clients understand what the finished space could become.

Sometimes the best solution isn’t simply the biggest extension.

2. Understanding what is possible on your property

Every house and site is different.

The location of your property, its relationship with neighbouring houses, the garden, existing building and local planning policies can all affect what you can do.

There may also be additional considerations if your property is within a Conservation Area or is a Listed Building.

LA Hally Architect has extensive experience working on extensions and renovations in Conservation Areas and on listed properties around Winchester and Hampshire. The practice recommends early consideration of planning issues and, where appropriate, obtaining pre-application advice from the local authority.

An architect can therefore help identify potential problems before you become too attached to a design that may be difficult to get approved.

3. Planning permission and your house extension

Not every extension requires a full planning application. Some may fall within permitted development rights, while others will require a Householder Planning Application.

The rules can be complicated, and permitted development rights depend on the circumstances of the property and the proposed work.

Where planning permission is required, an architect can prepare the necessary drawings and supporting information and submit the application on your behalf.

At LA Hally Architect, the planning stage develops the agreed design into detailed plans and elevations, while considering potential Building Regulations requirements at the same time. The practice can also advise when specialist consultants, such as planning or heritage professionals, may be appropriate.

Importantly, planning permission can never be guaranteed. However, experience of working with local planning authorities can help identify potential issues a nd shape a proposal accordingly. LA Hally Architect has worked successfully with planning authorities across Hampshire and surrounding counties with significant experience with the following authorities.

Winchester City Council
Eastleigh Borough Council
Southampton City Council
Fareham Borough Council
New Forest Distric Council
South Downs National Park
Test Valley District Council
East Hampshire District Council
Portsmouth City Council

4. What about Building Regulations?

Planning permission and Building Regulations are two different things.

Planning is primarily concerned with matters such as the appearance of a development, its effect on the surrounding area and whether the proposal is acceptable in planning terms.

Building Regulations deal with how the building is to be constructed to ensure it meets the required technical standards that apply in the UK.

For an extension, this can involve matters such as:

Structural design
Insulation
Roof construction
Walls and floors
Drainage
Fire safety
Electrical installations
Ventilation
Access

Following planning approval, LA Hally Architect can produce detailed drawings for a Building Regulations application and will work alongside a structural engineer, environmental consultants or other professionals as required for your project.

For most projects, LA Hally Architects uses a Full Plans Building Control application, allowing important construction details to be agreed before work starts on site.

This can give homeowners and contractors greater certainty about what is actually being built and, crucially, more certainty on the likely build costs.

5. Do I need an architect to find a builder?

No — but an architect can make the process considerably easier.

Once detailed drawings have been produced, a contractor needs enough information to provide a meaningful quotation.

At LA Hally Architect, this can include a detailed Schedule of Works alongside the construction drawings. This sets out what is required and helps reduce the likelihood of important items being missed from a quotation.

The practice can also help homeowners obtain quotations from contractors and compare the prices received, highlighting what is and isn’t included in each tender.

This is particularly useful because the cheapest quotation isn’t necessarily the cheapest project.

A quotation that excludes items which subsequently become necessary can quickly become more expensive once construction has started.

6. Can an architect help during the build?

Yes, and this is an area that is sometimes overlooked when choosing an architect.

Some homeowners appoint an architect to design the extension and obtain planning permission, then manage the construction themselves.

That’s perfectly possible.

However, you can also retain your architect during the construction phase.

An architect acting as Contract Administrator can visit the site, deal with queries, assess completed work and help ensure that the project is being constructed in accordance with the contract.

At LA Hally Architect, site visits and valuations are used to help ensure that payments to the contractor fairly reflect the work completed, while contract administration helps keep the agreed arrangements between the client and contractor on track.

For homeowners who don’t have experience managing building projects, this can provide considerable reassurance.

So, is an architect worth it for an extension?

There isn’t one answer that applies to every project.

If you’re planning a very straightforward alteration, you may decide that you don’t need an architect.

But if you’re investing a significant amount of money in your home, an architect can bring considerably more to the project than simply producing drawings for a planning application.

A good architect should help you answer questions such as:

What could we do with this house?

What’s the best way to use the space?

How can we bring more light into the existing house?

How should the extension connect with the garden?

What is likely to be acceptable to the planning authority?

How can we make sure the finished project is within our budget?

How do we turn the design into something a builder can actually construct?

At LA Hally Architect, we believe that successful residential architecture starts with understanding the people who live in the house. Our approach is to work collaboratively with clients to create spaces that are tailored to their lifestyle rather than applying a standard solution to every property.

How much involvement do you need from an architect?

One of the advantages of using an architectural practice is that you don’t necessarily have to choose between doing everything yourself and handing over the entire project.

LA Hally Architect offers a flexible range of services, from initial advice and design through to planning, Building Control, tendering and contract administration on site.

For some homeowners, the priority may simply be getting the design right and obtaining planning permission.

For others, having an architect involved from the initial idea through to completion provides the reassurance that someone experienced is helping manage the project throughout.

Thinking about extending your home?

If you’re considering an extension, renovation or alteration to your home in Winchester, Hampshire or the surrounding area, it can be useful to speak to an architect before you’ve finalised your ideas.

An early conversation can help establish what might be possible, identify potential planning issues and give you a clearer idea of the process, timescale and likely costs.

LA Hally Architect is a RIBA Chartered, award-winning residential architecture practice based in Winchester, specialising in extensions, renovations and bespoke residential projects throughout Hampshire and beyond.

If you’d like to discuss your project, get in touch with LA Hally Architect to arrange an initial consultation.