Question 1

How long does it take to build a garden room?

Accepted Answer

Most LouMil garden rooms take around 1–2 weeks on site from start to finish. That includes groundworks, the timber structure, EPDM rubber roofing, insulation, electrics and interior finishes. Larger annexes or complex projects with plumbing can take 3–4 weeks.

Question 2

How much does a garden room cost?

Accepted Answer

Every garden room is individually priced based on size, cladding, internal finishes, and extras like bathrooms or kitchens. Every build is bespoke, so we provide a detailed written quote. Contact us for a free, no-obligation quote.

Question 3

Do I need planning permission for a garden room?

Accepted Answer

Many garden rooms fall under permitted development and don't need planning permission, especially when under 2.5m high at the boundary. Annexes or larger buildings used as separate living accommodation may need approval. We'll advise you during your site survey.

Question 4

Are your garden rooms fully insulated for year-round use?

Accepted Answer

Yes. Every LouMil garden room is built with full insulation in walls, floor and roof. Combined with double-glazed windows and heating, this means your building is comfortable in winter and doesn't overheat in summer.

Question 5

What foundations do you use for garden buildings?

Accepted Answer

We typically use ground screw foundations with a structural timber floor. This is faster, less disruptive and more eco-friendly than concrete. During your site visit, we'll check your ground conditions and specify the right base.

Question 6

Can I fully customise the design of my garden room?

Accepted Answer

Yes. Every LouMil garden building is bespoke. You can choose the size, layout, cladding style, door and window configuration, and internal finishes. We design around how you'll actually use the space.

Question 7

Do you offer finance options on garden rooms?

Accepted Answer

Yes. We offer flexible finance options on many garden building projects, subject to status. Visit our Finance page or contact us and we'll talk you through example monthly payments.

Question 8

What warranty do you provide?

Accepted Answer

We provide a 10-year structural warranty on the main garden room frame and roof. You also get separate manufacturer warranties on doors, windows, electrical components and heating units.

Question 9

How much does a 4x3 garden room cost?

Accepted Answer

A 4m x 3m (12 sqm) garden room is individually priced depending on specification. Every build includes full insulation, electrics, heating, flooring and quality doors/windows. Contact us for a detailed quote.

Question 10

How much does a garden office with toilet cost?

Accepted Answer

A garden office with a toilet typically adds £3,000–£5,000 to the base price, depending on the plumbing run and specification. This includes the WC, basin, waste connection and any required drainage work.

Question 11

Are garden rooms cheaper than extensions?

Accepted Answer

Garden rooms are often 30–50% cheaper than traditional house extensions. They also don't usually require planning permission, cause less disruption, and can be completed in weeks rather than months.

Question 12

How much does a garden annexe cost to build?

Accepted Answer

Garden annexes typically start from £35,000 for a turnkey build including bedroom, bathroom and kitchenette. Larger two-bedroom annexes range from £50,000–£80,000 depending on size and specification.

Question 13

Do garden rooms add value to your house?

Accepted Answer

A quality garden room can add 5–10% to your property value and makes your home more attractive to buyers. They're particularly valued for home working, rental potential, and providing independent living space.

Question 14

What is the maximum size garden room without planning permission?

Accepted Answer

Under permitted development, garden rooms can cover up to 50% of your garden. Height limits are 2.5m at the boundary (within 2m) or 4m with a dual-pitched roof further away. We'll advise on your specific situation.

Question 15

Can I build a garden room on my boundary?

Accepted Answer

Yes, but it must be single-storey and no higher than 2.5m if within 2m of a boundary. We design many buildings to maximise space while staying within permitted development rules.

Question 16

Do I need building regulations for a garden room?

Accepted Answer

Garden rooms under 30 sqm don't usually need building regulations approval if they're not used for sleeping and are at least 1m from boundaries. Electrical work still needs Part P certification, which we handle.

Question 17

Can I sleep in my garden room?

Accepted Answer

Yes. Garden rooms can be used as guest bedrooms. If it's a permanent living space (annexe), you may need planning permission. We'll guide you through the requirements for your intended use.

Question 18

Do I need permission to run a business from a garden room?

Accepted Answer

Most home-based businesses from a garden room don't need planning permission if there's no significant change of use, no employees visiting, and no disturbance to neighbours. Check with your local council if unsure.

Question 19

How long does a garden room last?

Accepted Answer

A quality garden room should last 30+ years with proper maintenance. Our buildings use treated timber, EPDM rubber roofing, and quality materials designed for UK weather conditions.

Question 20

Can you build a garden room on a slope?

Accepted Answer

Yes. We regularly build on sloped gardens using adjustable ground screws and stepped designs. During your site survey, we'll assess the slope and design a solution that works.

Question 21

What cladding options are available for garden rooms?

Accepted Answer

We offer composite cladding (low maintenance), Western Red Cedar (natural warmth), timber effect uPVC, and metal sheet cladding. Each has different aesthetics, maintenance needs and price points.

Question 22

How are garden rooms heated?

Accepted Answer

We include electric panel heaters as standard. Options include underfloor heating, air conditioning (heating/cooling), or infrared panels. Many customers find a single heater sufficient due to excellent insulation.

Question 23

Can you add a bathroom to a garden room?

Accepted Answer

Yes. We regularly install toilets, showers and full bathrooms in garden rooms and annexes. We handle all plumbing, waste connections and certification.

Question 24

Do you build garden rooms in Birmingham?

Accepted Answer

Yes. We serve Birmingham and surrounding areas including Solihull, Sutton Coldfield, Edgbaston and Moseley — and we install nationwide across the UK.

Question 25

Do you install garden rooms in Solihull?

Accepted Answer

Yes. Solihull is one of our core areas. We've completed multiple garden offices, gyms and annexes across Solihull, Shirley, Knowle and surrounding villages.

Question 26

Do you cover Worcestershire for garden rooms?

Accepted Answer

Yes. We're based in the West Midlands and Worcester is our primary service area. We cover Worcester city, Droitwich, Bromsgrove, Malvern, Pershore, Evesham and surrounding areas.

Question 27

How far do you travel to install garden rooms?

Accepted Answer

We install nationwide across the UK — from the West Midlands and the North to the South West, South East and beyond. Summerhouses are also delivered UK-wide.

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