across the u.s.mid-century modernmaryland
Carderock Springs, Bethesda
Carderock Springs is a 1960s modernist subdivision in Bethesda, Maryland, built by developer Edmund Bennett with houses designed by Keyes, Lethbridge & Condon. Curving streets and cul-de-sacs follow wooded, sloping land, and the district was listed on the National Register of Historic Places in 2008. Recorded covenants require architectural review of exterior changes, and in 2025 the citizens’ association asked Montgomery County to study the area for local historic designation.
The housesThe rulesBefore you buy
- locationBethesda, MarylandMontgomery County
- built1962–1967first homes offered in 1962
- housesabout 275–400count varies by source and boundary
- designationNational Register, 2008not a county historic district
the houses
What makes them distinctive
- Fitted to the landHouses were dug into hillsides on wooded, sloping lots, and the slope of each roughly half-acre lot determined which model was built there.
- Nine modelsThe citizens’ association lists nine models: Atrium, Glenmore, Overlook, Woodside, Clubview, Parkridge, Valleyview, Hillcrest and Pineview.
- Two-slope roofsExcept for seven atrium houses, the homes have low-pitched two-slope roofs, which allowed cathedral ceilings but no attics.
- Glass and orientationModel homes featured large expanses of glass in rectangular patterns and window walls, with living spaces oriented toward south or southeast exposure.
- Trees and wiringBennett preserved trees wherever possible, and Carderock Springs was the county’s first subdivision with buried electrical lines.
- ClubhouseA 1962 shed-style clubhouse and a pool were part of the original development; today’s swim and tennis club is separate from the citizens’ association.
protection
Designation and the rules
- National RegisterThe district was listed on November 21, 2008, as part of a group of Bennett subdivisions designed by Keyes, Lethbridge & Condon. Montgomery Planning describes the listing as primarily honorific; it doesn’t restrict owners from altering or demolishing their homes.
- No county designation yetCarderock Springs isn’t in Montgomery County’s Master Plan for Historic Preservation. The citizens’ association requested a designation study on October 30, 2025; county designation would add review of exterior alterations and protection from demolition.
- Covenants and reviewNine recorded declarations (1962–1967) cover virtually all of the roughly 400 lots, including Carderock Springs South. Additions, exterior alterations, exterior painting, fences and sheds need advance approval from the Architectural Review Committee.
- Tree removalRemoving a hardwood 9 inches or more in diameter at shoulder height on an original Bennett lot needs Tree Committee approval, except dead, diseased or emergency trees, and approval is generally conditioned on planting a new one.
before you buy
What to check before you buy
- Find the covenantThe association’s covenant index matches each address to one of nine declarations; ask whether past exterior work received Architectural Review Committee approval.
- Compare to the original modelThe association posts original floor plans for several models, which helps show what has been altered; the Maryland Historical Trust notes that some altered houses no longer count as contributing to the district.
- Roofs, skylights and windowsLow-pitched roofs with cathedral ceilings mean there are no attics, so ask about the age and condition of the roof, skylights, windows and wood siding.
- Slopes and treesHouses sit dug into wooded hillsides, so have inspectors look at lower levels, grading and large trees near the house, and keep the tree removal rules in mind.
- Tax credit timingOwner-occupied houses that contribute to the district may qualify for Maryland’s 20% homeowner credit (at least $5,000 in eligible work, capped at $50,000 over 24 months), and the Maryland Historical Trust must approve the work before it begins.
Sources disagree on the number of houses (about 275 in the Maryland Historical Trust record, 360 per Montgomery Planning, about 400 lots per the citizens’ association), the listing year (2008 in federal and state records, 2009 on the association site), the end date (1966 or 1967) and the firm’s spelling, and the scanned nomination form couldn’t be read.
sources
Where this comes from
Checked October 20, 2026.
- National Park Service: NPGallery record, Carderock Springs Historic District (2008)Listing, boundaries, architects.npgallery.nps.gov/AssetDetail/NRIS/08001074
- Maryland Historical Trust: Carderock Springs Historic District, M: 29-59 (2008)Listing date, years, house count, clubhouse, altered houses.apps.mht.maryland.gov/nr/NRDetail.aspx?NRID=1550
- Montgomery Planning: Carderock SpringsHouse count, what listing means, the 2025 study request.montgomeryplanning.org/planning/historic/research-and-designation/carderock-springs/
- Montgomery Planning: Montgomery Modern, Carderock SpringsHillside siting, roofs, glass, trees, buried lines.www.montgomeryplanning.org/historic/montgomery_modern/caderock_springs.shtm
- Carderock Springs Citizens’ Association: CovenantsNine declarations, lots, Carderock Springs South.www.carderocksprings.net/covenants
- Carderock Springs Citizens’ Association: Improving your home and yardArchitectural review for exterior changes.www.carderocksprings.net/improving-your-home-and-yard
- Carderock Springs Citizens’ Association: Removing a treeTree removal approval and replanting.www.carderocksprings.net/removing-a-tree
- Maryland Historical Trust: Homeowner tax creditCredit rate, minimum, cap, pre-approval.mht.maryland.gov/funding/tax-credits/homeowner-tax-credit
- National Park Service: National Register FAQNational Register listing places no restrictions on what a non-federal owner may do with their property.www.nps.gov/subjects/nationalregister/faqs.htm
questions
Questions we hear
Is Carderock Springs a Montgomery County historic district?
No. It’s a National Register district, and in October 2025 the citizens’ association asked the county to study it for local designation.
Does National Register listing limit renovations here?
Montgomery Planning describes the listing as primarily honorific, with no limits on alteration or demolition, but recorded covenants still require Architectural Review Committee approval for exterior changes.
Can owners get historic tax credits?
Owner-occupied houses that contribute to the district may qualify for Maryland’s 20% homeowner credit, as long as the Maryland Historical Trust approves the work before it starts.
more to learn
Keep going
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- Builder FilesThe builders and architects behind Bay Area homes.
General information from the sources listed, checked October 20, 2026; not legal, preservation or construction advice. Confirm designation and permit rules with the local preservation office before you buy or remodel. The Boyenga Team represents buyers and sellers in Santa Clara County, bay-side San Mateo County and San Francisco.
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