The quick way to find a local House Extension specialist in Harpenden

Crane Builders LTD

House Extension

View ProfileRequest a quote

We are a family run Building Business with over 30 years experience. We specialise in the more complicated aspects of construction including structural and high finish work. We are recognized repairers of all types of P.R.C constructed buildings .

FRA Solution LTD

House Extension

View ProfileRequest a quote

With more than 15 years of experience in construction, interior renovations, and exterior improvements, our company is proud to have successfully completed over 1,200 projects. We began with small projects, but by consistently delivering high-quality standards, the scope and complexity of the work entrusted to us have grown significantly over the years. This is the first time we are using this platform, but the photos shown are part of our portfolio. Relying on our extensive experience and commitment to high-quality workmanship, we can provide the services you require. Once you have worked with us, we guarantee that you will want to continue our collaboration. Our business is built on quality, and we look forward to meeting you soon.

RPIOS LIMITED

House Extension

View ProfileRequest a quote

Our company is made out of hard working individuals with more than 30 years experience in the construction industry. We are specialised in loft conversions even though we can do any construction related work in any buildings. We have experience in loft conversions, painting, tiles placement, shutter carpenter work, brick work, laminate flooring, insulation placement, kitchen and bathroom fitting, plasterboard placement and many more. As we are new to this website we would appreciate some positive feedback after finishing the related work.

Choose To Build Ltd

House Extension

(4) Read reviews

View ProfileRequest a quote07900648860

Choose To Build Ltd are a hard working and friendly team that have 15+ years experience. We specialise in refurbishments and new builds. We have taken on and complete a range of different projects such as loft conversions , rear and side extensions and all internal building works. Choose To Build undertake any jobs big or small.

Latest homeowner review

Reviewed by narendra on 18/12/2023

Adrian the owner was very helpful and understanding the job was perfectly completed The estate agent who looks after the flat for me was very pleased and has added Adrians company to their list for recommendations to other landlords The bathroom looks very modern and has added value to the property I would recommand Adrian for a job well done

Masons Group LTD

House Extension

View ProfileRequest a quote

Masons Group Ltd provides extensive professional building services, specialising in roofing, leadwork, carpentry, structural welding, kitchens, bathrooms, extensions and complete property refurbishments. We combine skilled craftsmanship with quality materials to deliver durable, high-standard results on every project. From minor repairs to major construction works, we offer a reliable, honest and professional service from start to finish, with a strong focus on quality, safety and customer satisfaction.

CS

House Extension

View ProfileRequest a quote

Test test

Castle Wren

House Extension

(6) Read reviews

View ProfileRequest a quote

Castle Wren are a progressive and versatile construction business. Operating from the heart of Bishops Stortford on the Herts and Essex border, we work across the Home Counties, London and East Anglia. We continually strive to maintain our strong reputation for quality, and we have long standing partnerships with many of our clients with much of our work being repeat business. Our experienced and dedicated team cover all types of projects ranging from demolition and site clearance to new build housing schemes, commercial buildings or refurbishment projects. Private clients are an important part of our business, and we work with customers to bring their dreams to life, be that with a new extension, landscaping and garden transformations, patios and driveways or the end to end delivery of a new home. We have deep specialisms in demolition, groundworks, earthworks, and civil engineering projects and work with a wide range of clients, from private customers to national developers and housebuilders.

Latest homeowner review

Reviewed by Alan on 2/5/2024

After visiting my property, I was initially impressed by the gentleman who promised to quote, but have since heard nothing, in spite of more than one request to get back to me. Very disappointed

Property Renovation&Decorating Services

House Extension

(90) Read reviews

View ProfileRequest a quote07448421376

Property Renovation & Decorating Services "Excellence in Construction, Passion for Detail" With over 17 years of solid experience in the construction industry, our team provides comprehensive renovation and interior decorating solutions designed to bring your vision to life. Led by Emy, a professional renowned for his rigor, integrity, and craftsmanship, we are committed to delivering every project to the highest standards of quality. Our Services We offer a wide range of construction and finishing services, professionally managed from initial concept to final handover: Extensions & Conversions: Expert loft conversions, home extensions, and new builds. Full Renovations: Complete modernization of houses and apartments, including bespoke kitchen and bathroom installations. Premium Finishes: High-end interior and exterior painting, professional plastering, and precision tiling. Flooring: Installation of solid wood, engineered flooring, and carpet fitting. General Building: Structural repairs, general maintenance, and full-scale property refurbishments. Why Choose Us? Our reputation is built on four core pillars that ensure every client receives exceptional service: Attention to Detail: We believe perfection is in the finishing touches; every task is executed with surgical precision. Timeliness: We respect your schedule and strictly adhere to agreed deadlines. Transparency: Open communication and honest, competitive estimates with no hidden costs. Proven Expertise: Over 17 years of successful projects and satisfied homeowners. Contact Us for a Free Estimate Ready to start your home transformation? Contact us today for a free consultation and a personalized quote.

Latest homeowner review

Reviewed by Cristina on 12/8/2026

Lovely experience, the team is nice and professional. Delivered promise on time. Strongly recommend.

Mill House LTD

House Extension

View ProfileRequest a quote

Honesty, good workmanship , 40 years as a contractor, helpful, nothing is too big or too small, no over pricing, London based. Knowledge of all property aspects, including laws and management, politeness and total respect to our clients, and their properties You will not be disappointed

S Smith Building & Landscaping

House Extension

View ProfileRequest a quote

At s.smith building and landscaping we are passionate about our work and bring the highest quality work

A K BUILDERS

House Extension

(1) Read reviews

View ProfileRequest a quote

We are family run small construction business and proudly operating in South London for last 10 years. We specialize in a complete range of house renovation, refurbishment, maintenance and house extension services. We have an expert highly skilled team with extensive experience to achieve high standards on all of our projects. We work tirelessly to achieve the best results for our clients and have uncompromising commitment to customer satisfaction.

Latest homeowner review

Reviewed by Harry on 28/5/2020

AVOID Adil is a smooth talker who hasn't got a clue about work in the industry. Employed to refurbish a full house. A SUMMARY of issues follows. 1 - Plastering done is uneven. 2 - Did not allow plaster to dry before painting walls so already peeling off. 3 - Found number of areas where holes had been left, and had these not been pointed out would have been left. 4 - Wood not sanded before painting, incl. new skirting boards. 5 - Threats when I refused to pay!

Premier Site Services

House Extension

View ProfileRequest a quote

With over 20 years of proven experience in the construction industry, we bring expertise, reliability, and craftsmanship to every project we undertake. From small-scale builds to large, complex developments, we deliver on time, within budget, and to the highest standards of quality. Our highly qualified management team works closely with clients from concept to completion, providing strategic guidance and practical advice to ensure efficient, cost-effective construction solutions. No project is too big or too small,we approach every job with the same commitment to excellence, attention to detail, and dedication to achieving outstanding results. Partner with us and build with confidence.

AGA Builders

House Extension

(23) Read reviews

View ProfileRequest a quote

Friendy, reliable, thorough and tidy team. With fair prices and guarantee all our work.

Latest homeowner review

Reviewed by Gideon on 22/2/2022

Simply excellent work, as per spec, guaranteed and rapid. Very tidy, very polite. Couldn't be happier.

Iulian Electrical Services

House Extension

(10) Read reviews

View ProfileRequest a quote

We are a small family run business, our services include New builds, lofts, extensions, refurbs, we also take on small refits kitchens, bathrooms, gardens, structural alterations and ground works, plumbing and electrical. We aim to provide a comprehensive build package under one umbrella. Since opening our business in 2016 our main principle is "never cut corners or standards". We have managed to grow the business in the last few years immensely and establish ourselves as a recognised name. We aim to minimise stress for our clients by offering our expertise in all areas of the construction process and undertaking comprehensive project managing services with design consultation service also available throughout your project. We can provide all the services above by our own in-house team not 3rd parties or sub contracting. If you would like to know more about the work we do or would like a quotation for a project, please send us a message from the contact page or give us a call. We aim to respond to all queries within 48 hours.

Latest homeowner review

Reviewed by nicola on 26/8/2025

i used julian for the job i wanted done. it was completed in a couple days. he was on time and conscientious.really happy with the result.

Que Build London LTD

House Extension

(3) Read reviews

View ProfileRequest a quote07792792649

Quebuild London Ltd offers a full building service with every aspect of works covered no matter the scale or scope of works to both residential and commercial buildings.We also provide proactive and reactive maintenance packages with 24/7 one hour service for emergency call outs.We pride ourselves on using only highly skilled and courteous tradesmen with all trades in house so as a company we have full control of our projects. From your initial meeting with one of our knowledgeable estimators who provide fixed price detailed estimates to completion of works overseen by amazing management our clients needs are paramount,this ensures a streamlined service with quality controlled finishes beyond the industry standard. We have full public liability insurance with all risk assessments and method statements in place at all times no matter the size of works for peace of mind for us as a company but more importantly you as our client.

Latest homeowner review

Reviewed by Tom on 3/8/2024

John at Quebuild went above and beyond for us on this job. He completed all the work in a timely manner and for a very reasonable price. He was super knowledgeable and extremely attentive to detail, making sure to leave a high quality finish in terms of decoration - and he came back afterwards to address a few small things that needed doing. He was also a pleasure to have around - and I would highly recommend him for any other work. 10/10.

INS - Construction

House Extension

(10) Read reviews

View ProfileRequest a quote

We deal with insurance claims handling, reinstatement and repairs to any type of reinstatement including damage caused by escape of water, flood and fire damaged properties. We also completed works involving: Non-evasive leak detection. Insurance surveying / Schedules. Damp mapping and drying. Refurbishment and repairs to residential commercial buildings. Replacement kitchens and bathrooms. Plumbing. Plastering. Roofing. Painting and decorating. Asbestos surveys and removal. Carpentry. We are also a member of the The British Damage Management Association (BDMA)

Latest homeowner review

Reviewed by John on 4/3/2023

Astrit Karanxha

House Extension

View ProfileRequest a quote

Hi there All! We provide all type off building work undertaken with 22 years of experience,Plastering internal external rendering all type k rend,silicone rend, monocouche sand and cement, painting,tiling,Extension, loft conversion brickwork, driveways ,fencing,decking,etc

DC LOFTS & CONSTRUCTION LTD

House Extension

View ProfileRequest a quote

DC Lofts & Construction Ltd is a London-based construction company specialising in loft conversions, roofing, structural work, renovations, and full property improvements. We deliver reliable, high-quality workmanship with attention to detail from start to finish. Our services include new roof construction, structural alterations, loft conversions, partition walls, flooring, plastering, painting, doors, skirting, fascia, guttering, and exterior finishes. We work closely with homeowners to complete projects safely, professionally, and on time. We pride ourselves on clean work, strong communication, and practical solutions that add value to every property. Whether it’s a full loft build or general construction work, we focus on durability, quality finishes, and customer satisfaction.