We are a knowledgeable and nimble team delivering good engineering from a learning environment. We enjoy diversity in design; exploring new materials and concepts and through problem solving we achieve elegant and effective engineering across all sectors and project sizes.

Tara Fraser


BEng (Hons), PgDip, CEng, MIStructE, MICE

Chartered Civil and Structural Engineer

Beth Williams



Structural Engineer and Certified Passive House Designer


Established in 2005 as South Stoke Structures, the company's change of name in 2016 to Build Collective reflects the growing involvement with all industry sectors; expertise in Passivhaus, Party Wall work as well as structural and civil engineering. Coming from this rich variety of construction backgrounds, the team offers a comprehensive range of experience reflecting this diversity, whilst maintaining nimble and reassuring responsiveness.

Structural Engineering

The Institution of Structural Engineers describes our work as both an art and a science. We seek to excel in both the creative and analytical aspects of engineering using hand drawn sketches, CAD or 3D modelling to communicate our design to our clients and to co-ordinate with other members of the design and construction team.

We enjoy working in a collaborative way with our clients, architects and contractors. We believe successful designs are derived from understanding what each client is seeking to achieve and then tailoring our approach to add maximum value for each project.

Party Wall

The Party Wall etc. 1996 Act comes into force when works to Party Walls are proposed. It also covers other works that affect adjoining owner’s structures such as excavation works or chasing into a gable wall and also new building on a boundary line.

The first stage of complying with the Act is to identify what works are notifiable and who the adjoining owners are. Secondly, adjoining owners are notified and finally - if an adjoining owner ‘dissents’ to the work - a Party Wall Award is put in place to protect the adjoining owner and to give the building owner rights to implement their planned scheme.

Navigating this process and ensuring the best outcome for all concerned is greatly aided by Build Collective’s considerable engineering experience and understanding.

Civil Engineering

Build Collective is involved with the smaller end of civil engineering works that are often an essential part to constructing any new building, such as retaining walls and drainage design. We can design retaining walls in reinforced concrete, masonry and gabions and we will design soakaways to BRE 365.

Build Collective manages all aspects of design that are essential for constructing any new building: retaining walls, drainage design, flood risk assessments, 3D ground modelling, geotechnical services - all these are engineered to suit clients as required. We can design retaining walls in reinforced concrete, masonry and gabions and will design soakaways to BRE 365.


The PassivHaus standard is a detailed, fully measurable energy performance target for buildings. It is a ‘fabric-first’ approach to energy efficiency, relying on good quality materials and workmanship to produce building which cost as little as £15/year to run. The initial research was carried out in Germany on houses, but the standard has since been expanded to include all types of building. PassivHauses can include ‘bolt-on’ technologies such as solar panels and wind turbines, but this is not essential and most PassivHauses look so similar to ‘normal’ homes it is hard to tell the difference unless you know where to look.

The PassivHaus standard can also be applied to existing buildings in what is called an EnerPHit retrofit which generally involves works such as adding extra insulation and making the building airtight. This standard enables existing homeowners to reduce their energy consumption by up to 90%.

At Build Collective we offer full PassivHaus and EnerPHit refurbishment design services, as well as a consultancy service available to architects and designers wishing to meet the PassivHaus standard.


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01225 938 090 (Bath)

01172 800 177 (Bristol)

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Studio B,

25-27 Stokes Croft,

Bristol, BS1 3PY