A Guide to Sunroom Costs and Regulations

A Guide to Sunroom Costs and Regulations: Will It Add Value to Your Home?

Adding a sunroom or orangery is not just a design choice—it’s a strategic investment that can increase your UK property’s value by 5% to 10%, if crafted to match your home and comply with building regulations. At DHW Joinery, we speak with Yorkshire homeowners daily who want to expand their living space. In today’s economic climate, adding a glazed extension is less about luxury and more about making a calculated property investment.

If you are weighing up the return on investment (ROI) of a new extension, here is exactly what you need to know about the value, the costs, and the regulations involved.

Asset Over Aesthetics: The ROI of Premium Glazed Sunroom Extensions

Modern homebuyers are prioritising usable, year-round floor space. A poorly constructed, freezing-in-winter UPVC conservatory is often viewed as a liability by prospective buyers. In contrast, a thermally efficient, premium timber sunroom or orangery is viewed as a high-value asset.

Whether you opt for a traditional sunroom or an elegant orangery—which, as we discussed in our previous guide, typically features more solid brickwork and a spectacular roof lantern—you are adding high-quality square footage to your home. In competitive Yorkshire property markets like Harrogate, Leeds, or Ilkley, creating a versatile space that functions beautifully as a dining room, home office, or family lounge all year round makes your property stand out and commands a premium asking price.

How Much Does a Bespoke Orangery or Sunroom Cost?

“How much will it cost?” is usually the first question we are asked, and it is a vital part of calculating your potential ROI.

At DHW Joinery, every extension is unique. Here’s a cost comparison of the two most popular types of sunroom:

• Bespoke Timber Conservatory Sunrooms generally cost a little less than a more structurally complex orangery. Still, because of their diverse sizes, specifications, and building conditions, it’s hard to pinpoint an exact price. These are priced very much on a site-by-site basis.
• Premium Timber Orangeries, due to their heavier structural requirements, more complex foundations, brickwork integration, and roof lanterns, typically start at a higher price point and are best suited to larger, complex heritage projects. Or for those looking for multi-functional sunroom extension spaces. They do, however, generally lead to higher property prices, so it is a worthwhile investment.

Why Invest in Bespoke Timber Sunrooms over UPVC?

While UPVC might have a lower initial entry cost, it rarely delivers long-term value or meaningful resale growth for period properties. In fact, adding a mass-produced plastic extension to a classic Yorkshire home can actively diminish its perceived value and disrupt its traditional curb appeal over time.

In contrast, custom hardwood timber extensions provide a lasting, proven property investment that appreciates in value along with your home. Here is why discerning homeowners and property valuers consistently favour bespoke timber:

• Heritage Harmony & Architectural Integrity: UPVC simply cannot replicate the authentic sightlines, elegant proportions, and deep mouldings of traditional joinery. If you live in a period home, a listed building, or a Yorkshire conservation area, bespoke timber is often the only material that will satisfy local planning officers and perfectly match your property’s original masonry and character.
• Replacing Outdated or Non-Compliant UPVC: Many homeowners in Yorkshire inherit properties with ageing uPVC sunrooms that either stick out like a sore thumb against the period masonry or, worse, fail to meet strict local conservation area regulations. Replacing an unsympathetic plastic frame with bespoke timber instantly restores the property’s architectural dignity. You can see exactly how this elevates a home in our recent case study detailing the transformation of a UPVC orangery on a listed home in Yorkshire, where we replaced a tired plastic structure with an elegant, heritage-approved timber design.
• Lifelong Durability & Repairability: UPVC is susceptible to UV degradation—over time, it can discolour, become brittle, and warp. Once a uPVC frame fails or cracks, the entire unit usually needs to be replaced. Timber, conversely, is a lifelong asset. Crafted with advanced microporous paint finishes that allow the wood to breathe, our timber frames can easily be maintained, sanded, and repainted decades down the line to look brand new.
• Superior Thermal Insulation: Wood is an exceptional natural insulator. When combined with our modern draught-proofing systems and high-performance, warm-edge double glazing, bespoke timber frames provide incredible energy efficiency. They keep your new sunroom or orangery comfortably warm in winter and cool in summer, without the greenhouse effect often associated with cheaper uPVC alternatives.
• The Sustainable Choice: Today’s property buyers are increasingly environmentally conscious. uPVC is a carbon-intensive plastic that is difficult to recycle. Our sustainably sourced timbers, including advanced engineered woods like Accoya, act as natural carbon sinks, making them the most eco-friendly and responsible choice for extending your home.
• Endless Customisation: Off-the-shelf uPVC limits you to a handful of standard factory finishes. With bespoke timber, your design options are limitless. We can colour-match any exact RAL shade, apply sophisticated two-tone finishes (such as a contemporary ‘Clean White’ internally and a heritage ‘Anthracite Grey’ externally), and craft completely unique architectural shapes.

Ultimately, custom timber extensions deliver long-term structural strength, undeniable beauty, and absolute durability—all of which are highly sought after by buyers and valuers in the premium property market.

Do I Need Building Regulations or Planning Permission for a Sunroom Extension?

Navigating the red tape of home improvements can be a headache, but understanding the rules is critical to ensuring your new space is a legal, value-adding asset.

1. Planning Permission: Orangeries are usually more complex, but conservatories often fall under Permitted Development Rights, meaning formal planning permission isn’t required if they meet the size and height criteria. In Conservation Areas or for Listed Buildings, where these rights are usually restricted, planning permission is required.

2. Building Regulations: Building regulations focus on structural safety and energy efficiency and are separate from planning permission. If your sunroom or orangery is under 30 square metres, ground-level, and separated from the main house by exterior-grade doors with independent heating, it is usually exempt from building regulations. If you create an open-plan flow between your home and the extension, you must meet full building regulations to show the property will not lose excessive heat. In your design process, it’s always worth being thorough and checking this with your architect, designer, or local council.

If you’re in Yorkshire, then our team can guide you through the local planning and regulatory process for your sunroom, which we are really familiar with, ensuring your sunroom or orangery is fully compliant.

Why Bespoke Timber Orangeries & Sunrooms Add the Most Value

Ultimately, the value of a property addition comes down to harmony. Your sunroom extension should look as though it has always belonged.

By choosing bespoke timber joinery, we can perfectly match the architectural sightlines, mouldings, and masonry of your existing Yorkshire home. It satisfies the strict requirements of local conservation officers and captures the hearts of future buyers.

This commitment to lasting quality is exactly why we champion premium materials like Accoya. This high-performance, sustainably sourced wood is created by modifying radiata pine through a non-toxic process called acetylation. It withstands the harshest British weather without shrinking, swelling, or rotting. While modern UPVC quickly degrades and warps, Accoya boasts an industry-leading 50-year warranty and is designed to last a lifetime.

By choosing a bespoke timber sunroom or orangery, you are not only adding space—you are making a strategic investment in your property’s heritage, durability, and long-term market position. The value comes from expert craftsmanship, quality materials, and a finished extension that improves both everyday living and resale potential. Not sure whether a conservatory or orangery will serve you best? Explore the differences here in our guide. Alternatively, tap below to explore further extension ideas.