Marlborough has a small but genuinely accomplished architectural community, and the best architects in Blenheim cover everything from bespoke low-energy homes to schools, health facilities and commercial buildings. Every practice below has registered architects on the team, which matters because the title is protected in New Zealand and not every design practice holds it. KLT Architects and Arthouse Architects are the two names that come up most often locally.
1KLT Architects
KLT Architects is a Blenheim architecture practice founded in 2021 by registered architect Keryn Thompson, working from Level 1 on Scott Street. The team designs residential, small commercial and education buildings across Marlborough, the Sounds, the West Coast and the lower South Island, and takes interior fit-out and spatial design in-house alongside the architecture. It suits homeowners and schools after warm, low-energy, genuinely bespoke buildings rather than something adapted from a standard plan.
Services
- Residential architecture, including new builds, additions and renovations
- Small commercial architecture
- Education facilities and school alterations
- Interior fit-out and spatial design, covering joinery, lighting, finishes and fittings
- Feasibility studies and pre-purchase site suitability assessments
Highlights
- Won a Nelson and Marlborough Architecture Award in 2022 in the commercial category, for a low-energy certified office space
- Director Keryn Thompson is a Registered Architect, registration 5022
- Keryn sat on the jury for the 2025 Nelson and Marlborough Architecture Awards
- Passive House Academy trained, and a PHINZ allied member
- Four person all-women team spanning architecture, architectural design and spatial design
Location & Contact
Name: KLT Architects
Address: Level 1, 6-8 Scott Street, Blenheim
Phone: 021 0246 2951
Website: kltarchitects.co.nz
2Arthouse Architects
Arthouse Architects has been delivering projects since 2001 and runs studios in Nelson, Christchurch and Blenheim, with the Marlborough office on Alfred Street. The team includes registered architects, architectural graduates and technicians, with specialists in medical, green building and interior work, and the portfolio spans housing, multi-unit developments, schools, healthcare, commercial and sports buildings. It suits clients who want the depth of a larger practice with a local office.
Services
- Residential architecture, from new homes to alterations and additions
- Multi-unit and apartment developments
- Education projects, including Ministry of Education work
- Healthcare and medical facilities
- Commercial, sports and public buildings, including heritage and interior architecture
Highlights
- Nelson Marlborough Architecture Awards across several years, including Education in 2026, Housing in 2025 and both Housing and Small Project in 2024
- Gold at the New Zealand Commercial Project Awards in 2025, and a national category win in 2023
- Director Rachel Dodd is a past board member of Te Kahui Whaihanga, the New Zealand Institute of Architects
- Founding partner and signatory of the Diversity Agenda
- Operating since 2001 with a team of around 20 across three studios
Location & Contact
Name: Arthouse Architects
Address: 2 Alfred Street, Blenheim 7201
Phone: 03 928 4450
Website: arthousearchitects.co.nz
3Smart Alliances
Smart Alliances is a Blenheim consultancy on High Street that puts architecture, engineering, environmental work and resource management under one roof. The architecture team is led by Jarrod Midgley and covers new homes, renovations, passive and high performing houses, seasonal worker accommodation, education and commercial builds. It suits clients who would rather not coordinate a separate architect, engineer and planner across a complex consent.
Services
- Residential architecture, new builds and renovations
- Commercial, industrial and public space architecture
- Passive House and high performing home design
- Recognised Seasonal Employer accommodation complexes
- In-house structural, civil and geotechnical engineering, plus resource consenting
Highlights
- Architecture, engineering, environmental and resource management handled by one firm from concept to completion
- Seasonal worker accommodation is a Marlborough specific specialism no other local practice advertises
- Fourteen person team citing more than 35 years of combined experience
- Affiliations spanning NZIA, Passive House Institute New Zealand, Engineering New Zealand and ACENZ
- Second office in Kaikoura, covering the wider upper South Island
Location & Contact
Name: Smart Alliances
Address: 10 High Street, Blenheim 7240
Phone: 03 579 6211
Website: smartalliances.co.nz
How to Choose the Right Architect in Blenheim
- Check the practice actually has a registered architect on the team, since the title is restricted by law and a good many design practices are not registered.
- Decide whether you need an architect at all, because for many residential projects an architectural designer in Blenheim covers the same work at a lower fee.
- Match the practice to the building type, as school, healthcare and commercial work needs different experience from a one-off house.
- Ask about energy performance early if that matters to you, since passive and low-energy design has to be built into the concept rather than added later.
- Confirm who handles engineering and consenting, because some practices carry it in-house while others coordinate external consultants on your behalf.
Frequently Asked Questions About Blenheim Architects
What makes someone an architect rather than a designer in New Zealand?
The title architect is restricted to practitioners registered with the New Zealand Registered Architects Board, under the Registered Architects Act 2005. Registration requires an accredited qualification, recorded practical experience and an assessment of competence, and registered architects must maintain it. Anyone can design a building, but only registered practitioners may use the title.
Do I need an architect for a house in Blenheim?
Often not. Restricted building work on a home must be designed by either a registered architect or a Licensed Building Practitioner holding a design licence, and most Blenheim houses are designed by the latter. An architect is usually the better fit for a complex site, an unusual brief or a commercial building. For a straightforward new build or renovation, one of the architectural design practices in Blenheim will generally cover it for less.
How much do architects charge in Blenheim?
Fees are commonly a percentage of construction cost for a full architectural service, or an hourly or fixed fee for a defined scope. A full service costs more than an architectural design service because it typically includes more developed documentation, tender procurement and contract administration during the build. Ask what is and is not included before comparing quotes.
What is a full architectural service?
Usually concept design, developed design, detailed documentation, consent lodgement, help running a tender to select a builder, then contract administration and site observation through construction. Some clients take the full service, others stop after consent and manage the build themselves. Both are normal, and the fee should reflect which you choose.
Can Blenheim architects do passive or low-energy houses?
Yes, and it is a genuine local specialism rather than a marketing line, with Passive House trained designers practising in Marlborough. Low-energy design has to be set at concept stage, since orientation, glazing, airtightness and insulation all interact. Raise it at the first meeting rather than partway through.
Who handles building consent?
Most practices prepare and lodge the documentation and respond to council questions on your behalf. Consent requirements and processing times for the district are published by Marlborough District Council, and the statutory processing clock pauses whenever further information is requested.
How do I check an architect is registered?
Registered practices generally state it plainly, either as a registration number or by describing team members as registered architects. The New Zealand Registered Architects Board maintains the public register if you want to confirm it independently, which is worth doing if a practice’s own material is unclear.
Do Blenheim practices work outside Marlborough?
Most do. Local practices regularly take projects through the Sounds, into Nelson and Kaikoura, and down the east coast, and one has offices in three cities. Distance affects site visits and travel costs rather than whether the work can be done, so ask how site observation will be handled if your project is out of town.